The handle barrel & shaft are made from CNC machined aluminum while the end caps are made from Composite Matrix. The HV design allows this pump to inflate tires to riding pressure with 30% fewer strokes compared to conventional hand pumps. The overlapping handle & barrel with oversized piston & shaft are integrated into a compact design. Comes equipped with the ABS Flex Hose & a Composite Matrix frame pump mount.SMALL: 170mm 111g MEDIUM: 216mm 127g MAX: 90psi 6.2bar