1、Widely used for pneumatic pipe connections, air compressors, grinding machines, air drills, impact wrenches, pneumatic screwdrivers and other pneumatic tools for quick couplings. 2、The surface is finished with anti-corrosion and anti-rust coating, which can greatly prolong its span life. 3、Zinc alloy construction delivers outstanding stability and durability. 4、Simple design, and the standard G1/4in thread connector is convenient to use. 5、Easy to install, as long as the normal flow direction of the medium is consistent with the direction of the arrow indicated on the valve body. Features: Widely used for pneumatic pipe connections, air compressors, grinding machines, air drills, impact wrenches, pneumatic screwdrivers and other pneumatic tools for quick couplings. The surface is finished with anti-corrosion and anti-rust coating, which can greatly prolong its span life. Zinc alloy construction delivers outstanding stability and durability. Simple design, and the standard G1/4in thread connector is convenient to use. Easy to install, as long as the normal flow direction of the medium is consistent with the direction of the arrow indicated on the valve body. Specification: Condition: 100% Brand New Material: Zinc Alloy Color: Silver Thread Size: G1/4" - G1/4" Fluid: Air(No other gas or liquid) Available Hose: PU and Nylon Pressure Range: 0-150PSI / 0-10.2Kgf/cm2 (0-1.0Mpa) Negative Pressure: -29.5inHg / -750mmHg(-750Torr) Size: Approx. 5.8 * 2.4cm / 2.3 * 0.9in Weight: Approx. 60g Packing List: 1 x Pneumatic Check Valve Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.