COMPATIBILITY -- This R134A self-sealing dispensing valve bottle opener fits for a self sealing 1/2" ACME right hand thread for use with most R134A self-sealing/reusable designed cans. Please note there are two kinds for self-sealing can taps, R134A and R1234YF can tap, R134A self-sealing can tap with right hand threaded, but R1234YF self-sealing can tap with left hand threaded. Please check your can before purchase.<br> THREAD -- R134A valve can tap connecting thread 1/4 SAE Male, interface thread 1/2 ACME right hand female thread.<br> EASY INSTALLATION -- R134A self-sealing valve can tap is designed with safety check valve, and easy to open R134a self-sealing can with valve to turn off to reserve for future use.<br> PREMIUM QUALITY -- The R134A self sealing can adapter is made of aluminum alloy with heavy-duty construction, with gasket protected to prevent leaks for durable use.<br> Material: Aluminum alloy<br> Refrigerant Bottle Opener Thread (Female/Internal Thread): 1/2 RH<br> Cooling Pipe Connection Thread (Male/External Thread): 1/4" SAE