HD Thermostat-170 Degrees w/ Seal Manufactured with OEM quality materials and safety standards by an OE Supplier. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. High grade stainless steel and copper construction Meets or exceeds OEM standards Consistent and precise response to cooling system needs Original equipment design for worry-free direct fit replacement 100% tested and calibrated Flange Diameter: 2.87 in Gasket/Seal Material: Rubber Hardware included: No Jiggle Pin Included: No Prop 65: WARNING: Cancer and Reproductive Harm - www.p65WARNINGs.ca.gov Flange Thickness: 0.34 IN Gasket Or Seal Included: Yes Height: 3.23 IN Installation Tool Included: No Jiggle Pin Weep Hole: No Material: Stainless Steel Start to Open Temperature: 170 Deg. F