Features1HIGH QUALITY MATERIAL: The body of the bicycle mini air cylinder is made of aluminum alloy material, CNC machining art, strong and durable. 2SPECIAL TREATMENT: The surface of the air cylinder is anodized, with high gloss, not easy to fade, the storage length is 21cm, and the opening is 31cm. 3RETRACTABLE DESIGN: The air cylinder adopts a retractable design, which effectively reduces the volume of the cylinder body, takes up less space, and is easy to carry. 4MANUAL SWITCHING: Mini pump lightweight and convenient, greatly reducing the weight of the gas cylinder. Manual switching between valve and presta valve. 5SWITCH LOCK: There is a switch lock at the connection between the air nozzle and the cylinder body, which can be turned on and off by gently rotating the air nozzle on the head, which effectively avoids unnecessary losses caused by the random swing of the air valve belt during riding.SpecificationItem Type: Mini PumpMaterial: Aluminum AlloyStorage Length: Approx. 21cm/8.3inOpen: Approx. 31cm/12.2inFeatures:1. Lightweight and Compact2. Manual Switch Between Valve and Presta Valve3. Aluminum Alloy BarrelPackage List1 x Ball Needle1 x Ball Needle Hat1 x Pump2 x Screw2 x ScrewHat