This is an easy to use valve for adding fluoride to the air conditioner or refrigerator. It features metal thimble, comfortable handle and 11mm British air outlet interface, suitable for both car and home use. Features: Selected material, fine workmanship, anti-explosion and anti-pressure. One-way valve check design for safe operation. The metal thimble is easy to use and labor-saving. UK 11mm external thread air outlet interface, easy connection. Designed to connect canned refrigerant and fluoride adding tube. Insert the metal thimble into the box and connect it to the tube, then add fluoride after the exhaust operation. Silver: Fits most small refrigerant canisters. Red: suitable for R134A. Green: suitable for R12/ R22/ R410/ R600a. The valve can be used in car air conditioning, home air conditioner, refrigerator, etc. Note: Size and color may be slightly different due to manual measurement and different lighting conditions. Thank you for your understanding. Specifications: Color: Silver/Red/Green (optional). Material: Alloy Air outlet interface: British type, outer diameter 11mm Item size: 75 * 35mm / 2.95 * 1.38in Package size: 12.5 * 9 * 4.5 cm / 4.92 * 3.54 * 1.78in Package Weight: 120g / 4.23oz (Silver); 70g / 2.47oz (Red, Green) Package List: 1 * Refrigerant Charging Valve