12 Pack Air Conditioning Valve Core Kit R134A Car AC Refrigerant Valve Core Leakproof High Pressure Schrader Stem Cores for Car A/C System Service Vane Air Vacuum Pump R134a Recharge Hose Kit

Works as advertised and doesn't leak

Good value for the money

They work

It’s a hit or miss on these. About half of them don’t hold vacuum. Would not recommend since this is important part of the AC system and can leave your head scratching why it’s still loosing vacuum, even after new valves. Get better quality ones and pass on these.

Pros:Value Pack: The YehVeh 12 Pack offers great value, providing users with a sufficient quantity of valve cores for multiple replacements or installations. This bulk pack ensures that users have an ample supply of valve cores on hand for future maintenance needs, saving time and money in the long run.High-Quality Material: Constructed from durable materials, these valve cores are designed to withstand high pressure and temperature conditions commonly encountered in automotive air conditioning systems. Their robust construction ensures reliability and longevity, minimizing the risk of leaks or failures.Universal Compatibility: Compatible with R134A refrigerant systems, these valve cores are suitable for use in various car, truck, and vehicle air conditioning systems. Their universal compatibility makes them versatile and widely applicable, catering to a broad range of automotive makes and models.Easy Replacement: The valve cores are designed for easy installation, allowing users to quickly and conveniently replace faulty or worn-out cores without the need for specialized tools or expertise. This user-friendly design makes them suitable for DIY enthusiasts and professional mechanics alike.Cons:Packaging: Some users may find the packaging of the valve cores to be basic or lacking in protective features. Improvements to the packaging could help prevent damage or loss during shipping and storage, ensuring that all valve cores arrive in optimal condition.Compatibility Verification: While the valve cores are advertised as compatible with R134A systems, users should verify compatibility with their specific vehicle's air conditioning system before installation. Incompatibility could lead to issues such as leaks or improper sealing, necessitating additional replacements or adjustments.Overall, the YehVeh 12 Pack Air Conditioning Vehicle Valve Core AC Schrader Valve Cores offer excellent value, quality, and compatibility for automotive air conditioning system maintenance. Their durable construction, universal compatibility, and ease of installation make them a practical choice for both DIY and professional applications. However, improvements to packaging and thorough compatibility verification are recommended to ensure a seamless user experience.

I try to keep a good stock of A/C supplies, like refrigerants, oils, detector dyes and such. Also, small parts like o-rings and valves. I would call this a necessary item. These are cheap enough that it's good insurance should you have a valve leak. And I have replaced many valves. No, you can't fix a valve leak by screwing down the cap. These are nicely made. Good construction, no burrs on the threads and the seals are in perfect shape. A good value.

These are great for the price. They seem to seal like any others. They fit my vehicles 134a line. If you have an empty system these are easy to change out. If not, look into the lossless valve core tool. Thing is great for the one leaky valve you need to replace. They worked great once installed.

every one of these leaked on a fresh install. Ended up having to buy an overpriced kit from the local auto parts store to get the system working again.Ended up wasting a lot of time due to these schrader valves