Pump meets U.S.F.S. Specification #5100-256A. 5 gallon pump made of vinyl with polyester fabric, with welded seams for water-tight construction. Unaffected by hard water. Features a 44" long oil-proof hose; 18" (including nozzle) single stroke brass pump with non-starve feature, neoprene "O" ring seal. Grommetted shoulder straps are permanently affixed to bag.