Thermostat automatically adjusts the amount of water entering the radiator according to the temperature of cooling water, and changes the circulating range of water, so as to adjust the cooling capacity of the cooling system and ensure the engine to work in a suitable temperature range. Made of durable material for long service life. Excellent performance. Replace the old or broken thermostat directly. Specification: Condition: Brand New. Material: Rubber, Metal. Package content: 1 x Thermostat,1 x rubber ring.