Features Made of premium material and built with precise CNC machine, it is of good quality and durability. Adopts good quality sealing ring, which ensures excellent airtightness and prolongs service life. Each of the valves can control the air flow in the opposite direction. No spark during work, suitable for special occasions with high safety factor. Ultra-mini size, doesn't take up much space in the machine. Item specifics: Made of premium material and built with precise CNC machine, it is of good quality and durability. Adopts good quality sealing ring, which ensures excellent airtightness and prolongs service life. Each of the valves can control the air flow in the opposite direction. No spark during work, suitable for special occasions with high safety factor. Ultra-mini size, doesn't take up much space in the machine. Specification: Material: metal Color: as picture shown Size: Approx. 5.5 x 3.2 cm/2.16 x 1.26 inch Weight: approx. 151g Package list: 1x valve Package List