Withstand extreme changes in temperature. full construction. Solid quality materials for strong stability and long lasting durability, avoid cracks on tube or gasket. Plug and play to meet performance, provide a no-hassle installation and a leak free cooling system. Size: 19.5x6.8x9.1cm / 7.68inch x 2.68inch x 3.58inch(L*W*H) Thread Hole Size: 5.3mm / 0.21inch (D) Thread Size: M6x1.0 Fitment: For Rendezvous 3.6L 2004-2006 For 3.6L 2005-2008 How Engine Coolant Thermostat Works? The engine coolant thermostat controls the flow of coolant through the radiator to enable the engine to reach and maintain its normal operating temperature. A sensor inside the thermostat will cause it to open to allow coolant to flow to and from the radiator if the engine reaches to a certain temperature, to decrease the temperature, and it be recirculated through the engine. By repeating such cycle to keep your car engine running under temperature. Colour:silver Material:Metal Package Contents: 1 x Thermostat