Features: - :An accessory for bicycle air pump,pump for head for it,universal and 2 sizes of for head diameter can be optional,6mm and 8mm,you can choose the proper one for your needs.Made from metal,copper,high intensity and durable,high quality and for tough,will offer you excellent using experience.Smooth to use and easy to install on your bicycle inflator,great to trigger,open and close. Specification:Material: Copper,PlasticType: Bicycle SuppliesColor: Blue&SilverSize: Inner Diameter: 6mm(0.24in)8mm(0.32in)Quantity: 1 Pc(other accessories demo in the picture are not included)Note:1.Please allow 0 - 1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank youPackage includes(without retail package):1 x Pump for Head