Topeak Joe Blow Mountain II Floor Pump Pump Up the Jam This unique mountain bike specific floor pump features a super-sized barrel that inflates tubes nearly 50% faster than normal floor pumps. It delivers the higher volume required for large off-road tires, backed by a large, easy-to-read base-mounted analog gauge to help dial in the proper pressure every time. Features Super-sized steel barreldelivers 722cc per stroke for nearly 50% faster inflation than standard floor pumps Twin Head(R) pump headfits Presta, Schrader, or Dunlop valves without disassembly3. 5" base-mounted analog gaugewith an air release button for precise pressure adjustment Extra-long hosemeans you never have to spin the wheel to reach the valve Included ball and bladder needlesexpand versatility for inflating sports equipment SPECIFICATIONSBarrel Volume722cc per stroke Max Pressure60 PSI / 4 Bar Gauge3. 5" analog, base-mounted Valve Head Twin Head(R) (Presta/Schrader/Dunlop)Weight1. 59kg | Topeak | Joeblow Mountain Ii Floor Pump 3. 5 Gauge 60 Psi /4 Bar