Built-in safety valve prevents accidental discharge of refrigerant. 90-degree push-in and locking connectors with auto-closing feature. Hose made of high-quality rubber material for durability and practical use. Resistant to high pressure and reliable performance. Easy to use with included pressure gauge for clear readings during operation. Compatible with 1/4 inch, 5/16 inch, and 3/8 inch outer diameter pipes. Replacement part numbers: AP4502525, BPV31D, GPV14, GPV31, GPV38, GPV56, MPV31. Wide compatibility: AC recharge hose with gauge designed for R134A self-sealing refrigerant can tap with 1/2 inch thread. Suitable for adding R134A refrigerant to vehicle or home air conditioning systems. Compatible with R134, R12, and R22 refrigerant types. Features a piercing tap for connecting to R134A refrigerant cans and quick coupler port for car AC service connections. Designed for direct use with car R134A AC refrigerant systems. Color: As shown in photo Material: Rubber + metal Package Contents: 1 set x BPV31 Piercing Tap Valve Kit Note: Light reflection and display differences may cause slight color variation between image and actual item. Measurement may vary by +/- 1-3 cm.