General Pump 100439 Thermostat The 100439 Probe Style Thermostat has a 16(4)A – 380V Electric Rating & can handle up to 4,000 PSI. Includes Insulated Stainless Steel Capilary Copper Immersion Bulb – UL/CSA approved. Features: Electric Rating: 16(4)A – 380V Max. PSI: 4000 Temperature: 86-302 Degrees Fahrenheit