Diaphragm Pump, Inlet/Outlet 1/2 in FNPT, Housing Material - Pumps Polypropylene, Max. Temp - Pumps 140 Degrees F, Max. Flow 5.0 gpm, Max. Pressure - Pumps 45 psi, Voltage - Pumps 12V DC, Diaphragm, Diaphragm Material Santoprene(R), Check Valve Viton(R), Pressure On 20 psi, Pressure Off 100 psi, Length (In.) 9.1 in, Width (In.) 5.0 in, Height (In.) 4.58 in, Prime in Feet 14, GPM @ 0 PSI 5.0, GPM @ 20 PSI 4.5, GPM @ 40 PSI 3.8, Motor Type Totally Enclosed Nonventilated, Self-Priming Yes