What you will Get: Package includes 8PCS 3 or 4inch NPT hose end chicago fittings(4PCS male end 4PCS female end) 16 PCS silver locks 8PCS rubber washers. Self-Sealing Design: Prevents air leaks and ensures a secure connection, a tight and reliable seal max pressure 150 PSI. Claw-Style Design: Allowing for quick and easy connections and disconnections without the need for additional tools. Material: Made of high-quality carbon steel, the is galvanized, with exceptional durability and resistance to wear and tear. Widely Used: Ideal for pneumatic equipment, automobile industry, air compressors and mechanical engineering, ensuring a reliable and efficient system, it's an essential component in industrial applications. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Photo Color Material:Carbon Steel Package Contents: 8PCS 3 or 4inch NPT hose end chicago fittings(4PCS male end 4PCS female end) 16PCS silver locks 8PCS rubber washers Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.