Durablow MFB TS120 Fireplace Stove Blower Fan Magnetic Thermostat Magnetic Thermostat Switch for Fireplace Stove Blower Fan / Kit use, no screws and nuts needed. Durable quality replacement parts.  Upgraded part used: Stainless Steel #430 + High heat resistant ceramic (white part) thermo sensor. Thermostat switch activate approximately at 120F (50C), shut off approximately at 90F (32C) 2-year limit warranty. Reminding: Blower will not START until thermostat is heated to approximately 120 F