①. Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified, which include Part Number, Model Number and inspection date information. ②. If you have any questions about the item, please provide us the Manufacturing Part Number for checking, your profits will be guaranteed. ③. This refrigerant opener can open all standard piercing R134a canisters to quickly and easily charge your car, truck, SUV or other vehicle with coolant. ④. This R134a faucet valve is also equipped with a 1/4inch female to 1/2inch male adapter, which can be used with most standard HVAC hoses for automotive air conditioning systems and vacuum pump kits. ⑤. Our refrigerant distributors and hose adapters are made of heat-treated brass, which has strength and service life. ⑥. It has sharp pins, precision threads and thick O-rings to keep things triple tight, and can be refilled with refrigerant safely each time. ⑦. Specifications: Material: Brass; Color: Brass, Silver, Blue; Size: Brass Dispenser Valve: 6x3.57x1.15x1.05cm/2.36x1.41x0.45x0.41inch(HxWxThread ODxThread ID); Silver Dispenser Valve: 5.3x4.95x1.08x1.1cm/2.09x1.95x0.43x0.43inch(HxWxThread ODxThread ID); Weight: 128g. ⑧. Package include: 1 x Brass Dispenser Valve, 1 x Silver Dispenser Valve.