Pumptrol Pressure Switch, Electro-Mechanical, 10 to 45 psi, 15 to 30 psi Differential, 220 psi Maximum, 2NC/DPST-DB, 300000 cycles Operating Cycles, -33 to 257 deg F, Screw Clamp, Nitrile Diaphragm, Thermoplastic Housing, NEMA 1/IP20, 2.78 in W x 3.76 in D x 2.8 in H