Tefen12255612103 Nylon 66 Hose Fitting, Coupling, Gray, 3/4" x 5/8" Hose ID (Pack of 10)

While this looks like a good product, I find it curious that the measurement you select from the drop down are the outside diameter of the end of the lip (ie not including the ribs) and not the diameter pipe this will fit. I guess maybe I don't have enough experience, but this was something I looked for when purchasing and it is not described anywhere. So for mt 5/16 outside diameter pipe I suspect that I need 3/16 connectors...I guess we will see when it comes in. The description could be a lot more descriptive (hence the 3* rating) but I am glad we have this site as I could not find these connectors anywhere locally.Update: after ordering 3/16 connectors for my 5/16 line I installed these no problem (warm up the plastic line with hot water). You also need clamps FYI, 8mm of these just barely works Tefen Acetal Snap Grip Hose https://www.amazon.com/dp/B006OG427G . In the end I am very happy I could get these online...just frustrated that they did not have sufficient information to order correctly the first time. Yes OD in the brand name appears to mean outer diameter

I am using them on lab hoses for extensions on several vacuum lines. Solvents and acids cause them to need to be replaced now and then, but they work fine and are durable for a very long time.. On air or water only tubes, I imagine they would last indefinitely. Thank you.

These defiantly are not 1/2" they are 3/4" no good to me just wasting time returning this junk!

Awesome! They are made well and fit snug enough that I would probably trust it without the clamps!I didn't realize it was 10pcs so ended up with 20.Perfect for water hoses!

Worked well for attaching air tubing on s diffused air system.

These fittings are exactly what I needed. High quality couplings at reasonable prices.

Works exactly as said, good for extending the length of the pond hose.

Product as described. Accurate dimensions ribs are ample and dont damage hose inner tube when clamped