VeloChampion Airblast Racing Inflatable Rubber Toy Racing Compact Double Shot Bike Mini Pump Black/Silver It may be basic but quality and function are first class. The VeloChampion Airblast mini pump combines quality and value perfectly Double Air shot Shaft. Thumb lock lever Schrader (Mountain Bike) valve with Presta (Road Bike) attachment located in the handle, 100psi max pressure Bracket included to attach pump to bike. SIZE - 200mm Length. WEIGHT - 118g PLEASE NOTE: The pump is supplied ready set up for the larger Schrader MTB valve, you will need to use the silver valve attachment (located in the handle) to use the pump on Presta road valves. How to use the presta valve attachment: screw the adaptor on to the presta valve first. Next you'll need to push the pump on to the adaptor then lift the thumb lock lever.