Hearth & Home Technologies Replacement Four-Output Circuit Board with Knobs. The board comes with three knobs and three shafts. The knobs and spacers come packaged separately from the board, so be sure to check your box thoroughly for these items. It is important to check the compatibility of this product with your specific hearth product before ordering; please consult the owner's manual.This is a non-returnable part due to the sensitive nature of electronic circuit boards. Includes 3 knobs and 3 knob shafts. Item(s) must be in new condition, with all original accessories and in the original packaging. We are happy to assist you!