Sterling pumps feature a stunning high polished cnc laser etched aluminium body a universal head switches automatically between presta and schrader valves large dual piston allows 2 effortless modes 1 40 psi high volume and 40 100psi high pressure available with or without gauge air switch high volume high pressure material 6061 aluminium pressure 100psi 7bar warranty 5 years weight 116g 141g 40wgauge41 length 171mm 198mm 40wgauge41 gauge 100 p