Gates 33940 Thermostat Gates only partners with prime OE thermostat manufacturers to provide OE Exact or OE Type construction OE Type - Quality controlled factory calibration assures accuracy of opening and closing, regardless of pressure changes Features including jiggle pins and check valves for air venting, seals, and gaskets make these thermostats equivalent to the original equipment parts. OE-exact designed for customers that demand the exact OEM thermostat as a replacement product Matches the OEM product fit, function and design