DescriptionSize : 3.5cmMaterial : AluminumBrand Name : Origin : Mainland ChinaCertification : NONEModel number : YP0711087Bike air pump style : Suitable for Presta and SchraderMini pump ues : Bike Tire /BallCycling pump feature : Mini portable,lightweightBicycle pump net weight : About 30gMaterial : Aluminium AlloyNote : CO2 tank is not included CO2 Pump1.Adopted high-end quality aluminum alloy CNC processing, which ensure all parts are durable and accurate. With reliable gas volume adjustment knob switch, easy to use and control, no leak.Rubber EVA Foam sleeve(for 16g cartridges only) help to avoid frozen fingers when operating.NOTE: No CO2 cartridges included.2.Easy to Use & Twin Valve --- The gas control valve is marked by lock and unlock patterns, twisting the thread head accordingly to control the air volume inflated into tires. And this CO2 inflator is compale for both Presta and Schrader valves on bike tires. Simply connect the cartridge and bike tire, inflates in seconds, gets you riding again quickly.