Features: Made of premium material and constructed with precise CNC machine, it's of good quality and durability. Uses good quality sealing ring, which ensures excellent airtightness and lengthens the service of life. Each of valve can control the air flood in opposite direction. No spark while working, suitable for special occasions with need of high safety factor. Ultra mini size, taking no much space in the machine. Specification: Material: Metal Color: Shown as picture Size: Approx. 4.2 x 3.2cm / 1.65 x 1.26inch Weight: Approx. 151g Package List: 1 x Valve 1、Made of premium material and constructed with precise CNC machine, it's of good quality and durability 2、Uses good quality sealing ring, which ensures excellent airtightness and lengthens the service of life 3、Each of valve can control the air flood in opposite direction 4、No spark while working, suitable for special occasions with need of high safety factor 5、Ultra mini size, taking no much space in the machine