R134A REFRIGERANT CHARGE HOSE WITH GUAGE:The ac freon charging hose equiped with the scale guage reading for r134/r12/r22 types freon, piercing r134a can tap to connect puncture r134a refrigerant cans male mouth, r134a service quick coupler port to connect car ac r134a service male port. Directly used for car r134a ac refrigerant system PIERCING VALVE KITS:BPV-31 Refrigerator Tap Valve Compatible with 1/4 Inch, 5/16 Inch, 3/8 Inch Outside Diameter Pipes, Replace for AP4502525, BPV31D, GPV14, GPV31, GPV38, GPV56, MPV31 [AC Retrofit Valve]The r134a refrigerant charge hose also can be used for home refrigerator ac refrigerant system through equiped with this ac retrofit valve.[RH R134a Self-Sealing Adapter]Through the r134a self-sealing adapter, the r134a can tap off the refrigerator charging hose can compatible with r134a self-sealing cans. Male to connect the r134a can tap, the female to connect self-sealing cans. PREMIUM MATERIAL:Made of high quality metal with great rust-resistant