Features: The selflocking C styles quick connectors coupler features 1 handed push to lock mechanism and corrosions resistant steel beads, ensuring secure airtights connection for pneumatic tool and plumbing systems. Engineered with high performances PVC housing and double step leakproof seal, this lightweight connectors resists rusting and maintains structural integrity even under harsh environmental conditions. OSP20 female head+OPP20 male head:Used for PU pipe with outer diameter of 8mm and inner connection of 5.5mm; OSP30 female head+0P30 male head:Used for PU pipe with outer diameter of 10mm and inner connection of 6.5mm; OSP40 female head+OPP40 male head:Used for PU pipe with outer diameter of 12mm and inner connection of 8mm; Specifications: Component: Plastic Steel Connectors: C type quick plugs Applicable pressure ranges: 8kg 6Option Type; Package Includes: 1pc Quick connectors note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.