Fluid transfer pumps that feature: adapters to 3/4" (5 and 7 gallon)  and 2" (55 gallon) NPT threads, made of polypropylene and polyethylene for chemical resistance, 8 oz. per stroke, special pail adapter included to fit 5, 6, 15, 20, 30 and 55-gallon drums and includes O-ring for a better seal.