Review on Mudder R134A Refrigerant Charge Hose with Gauge: Universal AC Port Connect, Bullet Piercing Valve Kit, R134a Can Tap with Gauge and Dust Cap for R12/R22 and Retrofitting by Justin Vasquez

After one use, the thread that is attached to the refrigerant bottle has already snapped off and the bottle no longer fits properly. Not sure what metal was used, but it's soft enough to lose the thread already. No, I didn't overtighten the glass. This thing should last more than just 1 use. There were no problems with other parts of the set, it was quite simple and easy to use. Everything needed was included, just wish the above part was more durable as I was planning to use it on another fridge but can't now.