Features: Euro Female quick release fittings with 1/4" BSP Male Thread Built in valve prevents air escaping when changing from one tool to another 21mm hex for tightening Zinc Plated for corrosion protection Specifiations: Color: Silver Outer Diameter: 22mm/0.87" Top Diameter: 13mm/0.51" Bottom Diameter: 17mm/0.67" Total Height: 57.5mm/2.26" Quantity: 1 Pc Warm prompt: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!.