The F40-O is a replacement part and is used with Finlandia sauna controls. The timer knob had an oval-shaft and works with sauna control model F43. The F43 timer replaces the F44 timer. The thermostat control is a D-shaft and works with sauna control models F45 and the old model F44.

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