Package includes: you will receive 1 piece low-side 7/16 inch port, 1 piece high-side 3/8 inch port, 2 pieces adapters convert R12 to R134a for 2 piece GM port, totally 4 pieces, can meet your replacement need, and you can also get 4 pieces anti-dust cap for them

Application: these low/ high side retrofits converts 1/4 inch R12 R22 charging port and make it accept the R134a quick disconnect hose, fits most vehicles 1976 - 1995, excluding some GM cars 91 and up. Fits 1987 Lincoln Town Car 5.0L, 1991 Toyot a Pickup and some other models converted from R-12 to R-134. The low-voltage side is suitable for some household cars, please confirm the model and size before purchasing

Function: converts from R-12 to R-134a air conditioning system, this valve can be screwed on top of a closed AC system that just needs a little refrigerant or top off

Easy to install: connected to the thread for use with the valve, 1 gas valve inside, fitted with a plastic protective cover

Durable material: both of the kit are made of corrosion-resistant metal that won' t wear out or rust over time, and anti-leaking design that will be safer for you