The High Volume Boundary 1.5HV pump is designed for mountain bikers who need larger delivery of air for big tyres. An extendable head means it's easier to pump and the sealing lever doubles as a protective cover to keep it functioning no matter the conditions under tire. The frame bracket has been optimized for recessed frame down tube.Material: Alloy barrel and handleValve type: Extractable, reversible Presta/Schrader, with sealing leverMaximum Pressure: 70PSI / 4.8 barWeight: Small 98g approx.Features:High Volume construction optimized for mountain bikesInnovative sealing lever doubles as protective head cover protecting against water and dirtExtractable head reduces the risk of damaging valve stem during inflationFrame bracket optimized for Recessed frame down tubeDimensions: Small 170mmAir volume per stroke: Small 48cc