The package includes: There are 4 pieces 2 types of male/female compressed air quick coupler, 2 regular SH20 and 2 regular PH20. High quality material: These compressed air quick coupler are made of high quality iron. Nickel plated surface for rust, corrosion resistance and a good seal. Easy to install: just push back the snap ring and insert the pipe fitting plug. Be sure to put the snap ring back in the position lock to quickly connect or disconnect the tool and the air line.Wide Application: These compressed air quick connectors are widely used in the connection between pneumatic devices and hose Specification:Production name: Compressed air quick couplerMaterial: Iron with nickel-plated surfaceColor: Silver These compressed air quick coupler are widely used in the connection between pneumatic devices and air hose.With a surface Nickel plated, these compressed air quick coupler provide good air tightness, rustproof and corrosion resistant. Package Content: 2 x SH20 Female Compressed Air Quick Coupler 2 x PH20 Male Compressed Air Quick Coupler are all measured manually, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.