HD Thermostat-170 Degrees 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. Bolts Included: No Color: Gold Flange Diameter: 3.21 in Hardware included: No Jiggle Pin Included: No Prop 65: WARNING: Cancer and Reproductive Harm - www.p65WARNINGs.ca.gov Gasket Or Seal Included: No Height: 3.06 in Installation Tool Included: No Jiggle Pin Weep Hole: No Material: Stainless Steel Start to Open Temperature: 170.0 Deg. F