This is an easy-to-use valve for adding fluoride into air conditioning or refrigerator. It has metal thimble, comfortable handle and 11mm UK air outlet interface, suitable for both car and household use. Features: Selected material, fine workmanship, anti-explosion and anti-pressure. Anti backflow design of one-way valve for safe operation. Metal thimble is easy-to-use and labor-saving. 11mm outer thread British air outlet interface, easy connection. Designed for connecting canned refrigerant and fluoride adding tube. Insert the metal thimble into the can and connect with the tube, and then add fluoride after exhaust operation. Silver: suitable for most small cans of refrigerant. Red: suitable for R134A. Green: suitable for R12/ R22/ R410/ R600a. The valve can be used in car air conditioning, household air conditioner, refrigerator, etc. Note: Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding. Specifications: Color: Silver/ Red/ Green (Optional) Material: Alloy Air Outlet Interface: UK Type, 11mm Outer Diameter Item Size: 75 * 35mm / 2.95 * 1.38in Package Size: 12.5 * 9 * 4.5cm / 4.92 * 3.54 * 1.78in Package Weight: 120g / 4.23oz (Silver); 70g / 2.47oz (Red, Green) Package List: 1 * Refrigerant Charging Valve