2.2 GPM @ 70 PSI 3/8" 12V DC Diaphragm Pump 2.2 GPM, 70PSI / 4.5 BAR, 12 volt, 7.5 amps, 3/8NPT Polypropylene pump housing and valve plate for longevity and chemical resistance Viton valves  Santoprene diaphragm for increased durability and efficiency Approved for use with Round-Up and other agricultural brand herbicides Automatic shut off when no flow is required, conserving battery life