Package Includes: There are 4 pieces 2 types of male/female air quick connector, 2 ordinary SH20 and 2 ordinary PH20. High Quality Material: These air quick connectors are made of high quality iron. Nickel plated surface for rust, corrosion resistance and good sealing. Easy to Install: You just need to push back the snap ring and insert the hose connector plug. Make sure to put the snap ring back into the position lock to quickly connect or disconnect the tool and air line. Wide Application: These air quick connectors are widely used in the connection between pneumatic devices and air hose. Specification: Production Name: Air Quick Connector Material: Iron with Nickel Plated Surface Color: Silver Product Description: These air quick connectors are widely used in the connection between pneumatic devices and air hose. With nickel plated surface, these air quick connectors provide good air tightness, rustproof and corrosion resistant. Package Contents: 2 x SH20 Female Compressed Air Quick Connector 2 x PH20 Male Compressed Air Quick Connector Note: 1.Please carefully measure the inner diameter of the connected trachea before paying. 2.Please allow slight errors due to manual measurement. Thanks for your understanding. 3.Monitors are not calibrated same. Item color displayed in photos may be showing slightly different from the real item. Please take the real one as reference.