---
product_id: 327415288
title: "StratoFins Screw-on Water Rocket Fins"
brand: "relationshipware"
price: "VT8163"
currency: VUV
in_stock: true
reviews_count: 5
category: "Relationshipware"
url: https://www.desertcart.vu/products/327415288-stratofins-screw-on-water-rocket-fins
store_origin: VU
region: Vanuatu
---

# No tools or glue needed 95% launcher compatibility Durable plastic, reusable StratoFins Screw-on Water Rocket Fins

**Brand:** relationshipware
**Price:** VT8163
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate your water rocket game—launch higher, fly straighter, and never settle for less!

## Quick Answers

- **What is this?** StratoFins Screw-on Water Rocket Fins by relationshipware
- **How much does it cost?** VT8163 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/327415288-stratofins-screw-on-water-rocket-fins)

## Best For

- relationshipware enthusiasts

## Why This Product

- Trusted relationshipware brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Optimized Flight Stability:** StratoFins guide your rocket to straight, high-altitude flights—ditch the tumble and own the sky.
- • **Complete Kit for STEM Success:** Includes 3 fins, attachment ring, and launch tips—perfect for science projects, parties, and next-level fun.
- • **Durability That Defies Impact:** Crafted from tough plastic that withstands dozens of launches and rough landings without a scratch.
- • **Effortless Assembly, Instant Launch:** Screw-on design requires no tools or glue—get your rocket ready in seconds and stay ahead of the pack.
- • **Universal Fit for Maximum Launch Power:** Compatible with 95% of all launchers, homemade or commercial—never miss a flight opportunity.

## Overview

Relationshipware StratoFins are precision-engineered screw-on fins compatible with 95% of water rocket launchers. Made from durable plastic, they require no tools or glue for quick assembly on 2-liter or smaller soda bottles. Designed to stabilize flight and enable higher altitudes, the kit includes three fins, an attachment ring, and detailed instructions, making it ideal for STEM education, hobbyists, and family fun.

## Description

StratoFins will guide your rocket to lofty heights with straight flights instead of tumbling through the air. StratoFins are made of durable plastic and screw-on to a 2 liter soda bottle or smaller. These fins are compatible with 95% of all available launchers either homemade or commercially available in the marketplace including those employing a rubber stopper (4M), an expanding tube (AntiGravity), nozzle (Quest), O-ring (Aquapod), or cable ties (H2O Thruster) because it replicates the threaded portion of the bottle beyond the fins. StratoFins requires no tools or glue for assembly. The StratoFins kit includes 1 attachment ring and 3 fins along with an instruction sheet that provides information for creating a nose cone and several launching tips. Assemble StratoFins by sliding each fin down a separate slot on the attachment ring beginning from the top. With all fins in place screw the attachment ring onto a soda bottle until snug. This water rocket can be launched with or without a parachute attached since this configuration does not nose dive, but instead tumbles gently back to the ground provided the nose cone is not permanently attached. Great item for people of all ages for fun, science projects, school cl, parties, etc.

Review: My 2-3 year old son and I have been launching bottle rockets in our yard and in fields around town for the past two summers. After about 200-300 launches, we finally managed to destroy the the foam fins that came with the Quest Aerospace Deluxe Single Water Rocket Set. My wife just got me these StratoFins for father's day, and my son and I love them. They make refilling the rocket much easier compared to the foam fins that we'd been using. These are easier to unscrew and re-screw on while refilling the bottles. Also it's easier to switch between bottles because the same fins can be used on multiple bottles, no need to make new fins for every bottle. We've used our StratoFins for a few dozen launches each on both 1liter and 2 liter bottles, and they work great. I think they'll last many more flights than the foam ones (which I was about to replace with self made replacements before I was surprised with these as a gift. We've had maybe five launches that landed on asphalt or in the gravel on tI hhe edge of the road. There is not a single sign of damage or even any marks that didn't easily wipe off with a shirt tail. The Stratofins came with a flat black rubber gasket inside the female end of the connector, and it creates at least a good a seal between bottle and Stratofins as the seal between the Stratofins and the Quest Aerospace nozzle that we're using. It's fun to use and decorate foam, cardboard or wooden fins when you first get into bottle rocketry. If you're wanting to conduct a range of experimental flights with different rockets or other changes of setup of other elements (other than the fins themselves) these are great. They are perfectly compatible with the Quest Aerospace launcher, and I haven't seen another launcher (store bought or homemade that they wouldn't work with, because they just replicate the bottle's threads on the aft side of the fins. The red color also makes for ideal visibility regardless of whether the sky is blue or overcast.
Review: A little pricey for what they are, they do work great, and are a useful backup if the identical fins in their launcher kit get lost or broken. Of course, you can launch bottles with (or without) these, from about any launching stand, not just Relationshipware's, but they do stabilize the bottle in flight, and also make those bottles look like a "real" rocket. After experiencing a few launches, I'd say the likelihood of breakage is pretty small, and a single broken fin can be replaced 3 times from a spare set, as they are separately fitted. Most likely problem: loss on a windy day. Unless you have a huge open area to launch in, the bottles can go so high that the wind will carry them hundreds of yards, onto fenced properties, roofs, wood lots, weed patches, ponds, lakes or rivers, etc. Launching near Area 51? If the wind is blowing that way, keep the air pressure low! The Relationshipware launcher (with the "extra hole" modification) works so well that a spare set of fins is worth it to insure that increased altitude and "real rocket" looks aren't cut short by a mishap.

## Features

- Compatible with 95% of all available launchers either homemade or commercially available.
- Works with various styles: cable ties, rubber stopper, expanding tube, nozzle, or O-ring.
- No tools or glue required for assembly, simply screw-on to a 2 liter soda bottle or smaller.
- Take your water rocketry to the next level of higher flights with screw-on StratoFins.
- StratoFins kit includes 1 attachment ring and 3 fins along with an instruction sheet.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00BA3K0WY |
| Assembly Required | Yes |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #142,989 in Toys ( See Top 100 in Toys ) #2,083 in Educational Science Kits |
| Color | Red |
| Customer Reviews | 4.6 4.6 out of 5 stars (513) |
| Date First Available | 18 June 2014 |
| Educational Objective(s) | STEM |
| Item model number | FIN-1 |
| Language | English |
| Manufacturer recommended age | 14 years and up |
| Material Type(s) | Plastic |
| Number of Game Players | 1 |
| Number of Puzzle Pieces | 4 |
| Product Dimensions | 19.05 x 13 x 4.45 cm; 28.35 g |
| tech_spec_battery_description_toys | No batteries required |

## Images

![StratoFins Screw-on Water Rocket Fins - Image 1](https://m.media-amazon.com/images/I/51-HQenGsQL.jpg)

## Questions & Answers

**Q: what is the internal diameter of the red threaded end of the assembly?  Is it the same as the internal diameter of the threaded 2L bottle opening?**
A: This answer is coming from Dallas Murdoch, Owner of EZ-Launch LLC and a dealer for the red fins.  The internal portion of the top half of the red fin assembly is threaded and screws onto the launch bottle.  Its diameter is 29.6 mm.  The internal diameter of the threaded opening on a two liter launch bottle is 21.0 mm.  The internal diameter of the lower 1/2 of the fin assembly is 21.3 mm.  The internal diameter of the pop bottle where the external threads are located is 21.1 mm.  If you are using an EZ-Launch bottle rocket launcher with the red booster fins, you need to have a round white ABS plastic insert glued to the lower threaded portion of the red booster fins.  This comes with the booster fins when ordered from EZ-launch.com and is necessary to lock the bottle with the fins into the EZ-Launch bottle rocket launcher.  Also, The red booster fin assembly requires a separate black launch pipe in order for the bottle to maintain a steady air pressure and hold the water inside of the bottle.  This also is included in the EZ-Launch bottle rocket booster kit that comes from EZ-Launch LLC.

**Q: Why do these required using an additional nose cone?**
A: the additional nose cone improves aerodynamics and is where the parachute is placed for launch

**Q: What type of plastic is this product made with, my son has sensitivities.**
A: The StratoFins are made from polypropylene (PP), which is the same plastic on the white cover of a Tic Tac Mint container that has the "living hinge."

**Q: Like the nose cone idea. Anybody use a mylar parachute?**
A: We have no experience with using mylar for a parachute, but that sounds like an interesting idea. It should be durable and lightweight, which might make a great choice for material. The only issue might be how well it drapes, since it could be somewhat stiff although you could pre-wrinkle it. Plastic trash bag work for parachutes and mylar wouldn't be too much different from that of than draping. We use rip-stop nylon for our parachutes, which is very durable with great longevity. If you are using it on a water rocket, watch the video link if you haven't seen it already. It will help explain attaching it to a 2-liter soda bottle and offer deployment techniques.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by B***N on 16 June 2014*

My 2-3 year old son and I have been launching bottle rockets in our yard and in fields around town for the past two summers. After about 200-300 launches, we finally managed to destroy the the foam fins that came with the Quest Aerospace Deluxe Single Water Rocket Set. My wife just got me these StratoFins for father's day, and my son and I love them. They make refilling the rocket much easier compared to the foam fins that we'd been using. These are easier to unscrew and re-screw on while refilling the bottles. Also it's easier to switch between bottles because the same fins can be used on multiple bottles, no need to make new fins for every bottle. We've used our StratoFins for a few dozen launches each on both 1liter and 2 liter bottles, and they work great. I think they'll last many more flights than the foam ones (which I was about to replace with self made replacements before I was surprised with these as a gift. We've had maybe five launches that landed on asphalt or in the gravel on tI hhe edge of the road. There is not a single sign of damage or even any marks that didn't easily wipe off with a shirt tail. The Stratofins came with a flat black rubber gasket inside the female end of the connector, and it creates at least a good a seal between bottle and Stratofins as the seal between the Stratofins and the Quest Aerospace nozzle that we're using. It's fun to use and decorate foam, cardboard or wooden fins when you first get into bottle rocketry. If you're wanting to conduct a range of experimental flights with different rockets or other changes of setup of other elements (other than the fins themselves) these are great. They are perfectly compatible with the Quest Aerospace launcher, and I haven't seen another launcher (store bought or homemade that they wouldn't work with, because they just replicate the bottle's threads on the aft side of the fins. The red color also makes for ideal visibility regardless of whether the sky is blue or overcast.

### ⭐⭐⭐⭐⭐ Review
*by A***R on 19 June 2015*

A little pricey for what they are, they do work great, and are a useful backup if the identical fins in their launcher kit get lost or broken. Of course, you can launch bottles with (or without) these, from about any launching stand, not just Relationshipware's, but they do stabilize the bottle in flight, and also make those bottles look like a "real" rocket. After experiencing a few launches, I'd say the likelihood of breakage is pretty small, and a single broken fin can be replaced 3 times from a spare set, as they are separately fitted. Most likely problem: loss on a windy day. Unless you have a huge open area to launch in, the bottles can go so high that the wind will carry them hundreds of yards, onto fenced properties, roofs, wood lots, weed patches, ponds, lakes or rivers, etc. Launching near Area 51? If the wind is blowing that way, keep the air pressure low! The Relationshipware launcher (with the "extra hole" modification) works so well that a spare set of fins is worth it to insure that increased altitude and "real rocket" looks aren't cut short by a mishap.

### ⭐⭐⭐⭐⭐ Review
*by M***D on 13 November 2023*

Easy to use and sturdy fins for water bottle rockets. This is a good company that makes it easy to get flying. Of course, the only downside is the costs. But if you're in a hurry or don't feel like making it all, this is one of the best with guaranteed results.

## Frequently Bought Together

- StratoFins Screw-on Water Rocket Fins - Compatible with 2 Liter Bottles or Smaller
- Relationshipware StratoChute 24" Red Rip-Stop Nylon Parachute for Water or Model Rocket

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-01-29*