Black Tstat Knob [2" Dia] [0 – 10 – 1] [Flat .187] [Bottom] Also for Essence Combination Gas Valve. American Permanent Ware Warmer W- 6, W-9, W-12 Series: BW, HFW, SW, TW Replaces the following manufacturers OEM numbers are used for reference only, see policies for details. OEM OEM # apw (Permanent American Ware) 56505 apw (Permanent American Ware) 56528