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- and anti-leaking performance. The hose is made of rubber,good pressure resistance, safe to use.both of the kit are made of - metal that 't wear out or rust over time, and anti-leaking design that will be WIDE COMPATIBILITY: The AC recharge hose with gauge completed with R134A self-sealing refrigerant can opener tap dispensing valve with 1/2inch thread, for use in adding R134A refrigerant to the vehicle or home air-conditioning with highly working performance. Colour:Photo Color Material:Rubber + metal Package Contents: 1 set x BPV31 Piercing Tap Valve Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.