Pulsafeeder’s MEC-O-MATIC VSP series variable speed peristaltic metering pump offers a dispenser head which is molded of highly chemical resistant polycarbonate and is designed to snap on and off without tools. MEC-O-MATIC’s self-lubricating roller assembly, included in the dispenser head assembly, makes possible long tubing life and the unique quick release, twist off head makes tubing replacement simple and fast. The dispenser case is molded of a rugged, chemical resistant ABS. Mounting pads and a built-in wall mounting provision allow a choice of flat surface or wall mounted installation. Continuous duty D.C. motor with electric control allows the VSP internal adjustment knob to decrease or increase the gear motor speed to regulate chemical metering. Gearing is permanently lubricated to reduce pump maintenance.