Wide Compatibility: The car HVAC refrigerant recharge kit fits for R134A R12 or R22 refrigerant refrigerant to vehicle or home air-conditioning. Premium Quality: The R134A A/C charge hose kit is made of metal and high quality rubber material, with solid construction and stable performance. Easy to Install: Push & Lock coupler with auto shut off, easy and convenient to use. Dimension: Auto 1/2 ACME Female refrigerant can opener tap dispensing valve, please note this is a puncture type can opener, not self-sealing can tap. 59” charging hose with 1/4" SAE port side, 200 PSI pressure gauge, and R134A 13mm Low side adapter. Note: If the gauge needle is not at 0 psi, open the gauge cover and use a screwdriver to turn the screw on the gauge to reset the reading to 0.