Widely Used: The four-in-one brass vent valve is suitable for all cars, trucks, and motorcycles Material: Made of solid pure copper, durable and reliable in quality, Durable and long service life Four-in-one Design: The four air release valves can be disassembled separately or assembled to form a device, Comes with a key ring for easy carrying and storage Simple to Use: Simply screw the 4 air release valves onto the standard American-style valve stem, then press the pin on the valve core to start air deflation Packing List: 1 x Bleeder Valve