12VDC 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 and 2" NPT connection. Includes Telescoping Polypropylene Suction Tube, 1"x12' Hose, Shutoff Ball Valve and Nozzle retainer