115VAC Electric Diaphragm Pump with reciprocating, spring driven configuration that maintains constant pressure regardless of load. Pump automatically goes neutral when the end of hose valve is shut off. Glass-reinforced polypropylene pump housing provides integrity and excellent material compatibility inside and out. Santoprene Diaphragms, EPDM Elastomers, Pump-N-Go Unit . Includes Telescoping Polypropylene Suction Tube, 1"x12' Hose, Shutoff Ball Valve, all items to unload from a tote or drum.