Integrated Housing Thermostat-180 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. Offset design, air relief valve, and OEM style seals included where applicable. Bolt Hole Quantity: 0 Bolts Included: No Color: Silver Gasket or Seal included: No Hardware included: No Installation Tool Included: No Jiggle Pin Included: No Material: Aluminum, Stainless Steel, Copper Bleeder Hole: No