The quick-release pneumatic connectors are easy to connect and disconnect air hoses quickly and efficiently. The design is perfect for different diameter hoses, making it versatile and adaptable to use. The connectors are made from ABS and copper materials, reliable to use. Features -Color:Blue -Material:Copper, ABS -Size:4.70X1.90X1.90cm/1.85X0.75X0.75in -Size:4.30X1.80X1.80cm/1.69X0.71X0.71in -Size:3.80X1.40X1.40cm/1.49X0.55X0.55in -Size:3.60X1.20X1.20cm/1.41X0.47X0.47in -Size:3.20X1.00X1.00cm/1.26X0.39X0.39in -Specification: 4mm, 6mm, 8mm, 10mm, 12mm -These air hose connectors are designed to be versatile and can easily adapt to type of pneumatic system. -These connectors are built to last and can withstand wear, ensuring their reliability. - The air hose fittings are incredibly easy to use, saving users time and effort during installation. -These air hose fittings are suitable for a wide range of applications, including automotive, industrial, and diy projects. - These air hose fittings allow for easy installation and removal, making maintenance and repairs easy. Package list: 250 x Pneumatic Fittings (5 Styles)