MettleAir 4F210-08LG-1PK Locking Foot Pedal Valve with Guard, 4 Way, 2 Position, 1/4" NPT Type: 4 way 2 position Pneumatic Foot Pedal Valve with Guard Model: 4H210-08 Ports: 1/4" NPT Position Lock: Allows pedal to be locked in the down position