FAYAZ bicycle pump is made of aluminum alloy. 1. Please observe the tire pressure when inflated, it is recommended not to charge more than 250psi. 2. Immediately after inserting the inflatable port, lock the wrench and inflate it. 3. Make sure that the leak has been used before grinding tires grinding grinding. 【Dual Valve Design】The mini bike pump comes with 2 valves that are compatible with Presta and Schrader valves, allowing you to inflate the tire without changing the adapter. The high strength locking buckle of the cycle pump will not fall off when it is inflated: the pull rod is lifted to lock the air nozzle (at this time you can pump the bicycle tire), and the press is loosened to open the air nozzle, making it more convenient to inflate. Specification: Material: ABS + Aluminum alloy Package Includes: 1x Bike Pump 1x Frame Mount Bracket with 2 Screws 2x Ball Needle 1x Air Inflation Needle