Built-in safety valve prevents accidental discharge of refrigerant. 90-degree push-in and locking connectors with auto-closing. The hose is made of high quality rubber material, durable and practical to use. Resistant to high pressure and reliable. Easy to use. The pressure gauge is included for easy viewing during use. Compatible with 1/4 inch outer diameter, 5/16 inch, 3/8 inch pipe. Replace Part Number: AP4502525, BPV31D, GPV14, GPV31, GPV38, GPV56, MPV31. 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. 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 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.