It has a dual-chamber/dual-plunger pumping system for high pumping efficiency and has a maximum output of 73psi.
SKS Airboy Mini Pump (XL)This Airboy XL Pump from SKS is a powerful pump that fits perfectly into jersey pockets. It has a dual-chamber/dual-plunger pumping system for high pumping efficiency and has a maximum output of 73psi.Features:Material: AluminiumValue: AV, SV, DVMax Output: 73psiLength: 179mmWeight: 90gBuy SKS Accessories from Chain Reaction Cycles, the World's Largest Online Bike Store.