This Knob, T-Stat Blk is for use on Amerec's Sauna Heater Controls. The T-Stat Knob Black (Blk) is used for the Thermostat dial which has a "D" post on the following controls and heaters: AS100, C102A, C103A, C104A, C105A, MS60A, WC1.7, WC2.5, WC5.0.

NOTE: To preserve the originality, operation and safety of replacement parts, this product is not returnable.