●Compatibility: R12 to R134A is fully used to use the R134A quick connection interface, 1/4 inch SAE or 7/16 inch -20UNF adapter replaces R12 R22, perfect air conditioning conversion adapter kit. ●Material: R12 to R134A. Modify the quick conversion adapter kit made of brass and plastic. The solid structure has high heat resistance, durability and safety. ●Size : The package contains two R12 to R134A adapters. The low-end connection 1/4 inch SAE (7/16 inch -20 line), 1/4 inch SAE connection (7/16 inch -20 thread). ●Easy to install: R12 to R134A retro connector has been connected to a thread used with the valve, and there is a removable Schrader valve. Equipped with plastic protective blocks, convenient and quick installation. ●Wide application: suitable for most vehicles. However, check the existing valve size to ensure correct use.