Replacement Thermister probe (ESP Probe) with redwires for Harman Pellet Stoves. AKA: Exhaust Sensing Probe This part is NOT interchangeable with the Black Wire Thermister Probe. Please check to see which ESP Probe your Control Board Uses For Use with Harman Pellet Stoves: Accentra Cast FS (Serial # 00840167 and higher) Accentra Insert (Serial # 008241201 and higher) Advance (Serial # 008360001 and higher) HF60 P35i Pellet Insert P43 P61 (Serial # 008085055 and higher) P61A (Serial # 008085803 and higher) P68 (Serial # 008280309 and higher) PB105 PC45 (Serial # 008055031 and higher) PF100 (Red Wires) XXV (Serial # 008206292 and higher) BH60 BH105 BA100 (Red Wires) SAME DAY SHIPPING ON ORDERS PLACE BEFORE 2:00PM EASTERN TIME 87200 Next day air shipping for Saturday delivery note to all buyers: All orders placed on Fridays will arrive the following Monday/Tuesday depending on location or holiday schedule. does not provide that shipping option. Thank you for your business 24/7 Parts