Valve Core Remover: Works on Schrader and removable Presta Valves(not all are removable). Compact Design, CNC precision machined, aircraft aluminum. Removes and install Presta valve extenders with 5mm wrench flats. Easily tighten or remove valve cores on bicycles, cars, and any other air filled tires. Specification: Material: aluminium alloy Size: approx. 54 x 11 x 10mm/2 x 0.4 x 0.39inch Schrader Valve Core: 100% brand new and high quality. Good sealing, accurate size, anti rust, durable. Small size,easy to use and carry. Schrader valve core, suitable for most modern bikes such as mountain bikes, road bikes, bikes and other gas nozzle. Specification: Material: Copper Size:Approx.20 x 5 x 5cm/7.87 x 1.97 x 1.97inch Package Includes: 1 Piece Valve Core Remover 10 Pieces Schrader Valve Core