1. Materials The mini bicycle pump is made of aluminum alloy materials and precision parts. It can be used as a mountain bike pump, a ball pump, an electric bicycle tire inflator, and also as a bicycle tire repair tool accessory. 2. Compact and Portable The shock - absorbing pump is small in size, powerful, and retractable. It can fit into any pocket or backpack and can also be installed on the bicycle frame. It will be a helpful tool for smooth travel and is a set of bicycle accessories and tire repair tools. 3. Multifunctional Design The mini air pump is compatible with Presta and Schrader valve stems and has a needle inflation function for basketballs, footballs, and volleyballs. It is a suitable mini bicycle pump for all bicycle tires and joints. 4. Easy to Use Compared with traditional mini manual bicycle pumps, the mini air pump requires about 30% less pumping to reach the pressure required for cycling and can quickly inflate basketballs, footballs, volleyballs, etc. 5. Specifications Dimensions: 6.1 inches when extended, 3.9 inches when retracted. 6. Package Contents 1. 1 mini portable pump 2. 1 extension hose 3. 1 ball inflation needle 4. 1 bracket 5. 1 balloon inflation nozzle 6. 2 fixing screws