TheSpecialized Air Tool Switch Compis a durable frame pump withSwitchHitterhead automatically adjusts forSchraderorPrestavalve tubes and shows pressure on a rotatablegauge. Specialized Air Tool Switch Comp Features SwitchHitter head works on Schrader or Presta valves with no disassembly. Gauge body rotates for easy viewing. Durable plastic barrel with aluminium shaft to reduce flex and improve efficiency. Plunger locks to body chamber with a simple twist for secure storage. Water bottle boss mount included. Max pressure: 120psi (8.3bar) Volume per stroke: 48.4cc More info