1/2" Double Diaphragm Pump with polypropylene body and Buna N diaphragm and seals. Inlet and discharge connections are 1/2" NPT. Pump is rated at 15 GPM @ 100 PSI, will not bypass air in stall condition. Maximum dry suction lift is 18 feet, air supply pressure range 20--100 PSI, max. fluid temperature 1800 F, max. size solid 1/32" (1 mm), 1/4" air inlet connection.