Innovative three stage design that achieves both high pressures and high volume in record time stage one opens both barrels for big volume to reach 60psi with 30 less effort than standard floor pumps stage two uses the main barrel only for pressures up to 120psi while stage three engages the small barrel to achieve an amazing 260psi padded handles wide stable base and large dial gauge make inflation easy anodised aluminium barrel 3 stage 0 60psi 60 120psi 120 260psi gauge analog b