Overview Reviews Similar Products Product Description Analog Duplex Circuit Board (Product with temperature control knobs) 51230 SAME AS 27100 51230 51364 51256 53065 3-60-0023 Product Videos Custom Field Product Reviews Find Similar Products by Category Recommended Quick view Balboa Circuit Board, Duplex Digital, Part # 54003 $534.47 $369.95 Add to Cart Quick view DUPLEX ANALOG BOARD $392.84 Add to Cart Quick view Balboa Circuit Board, L-1500, ANALOG COMPLETE, W/ RIBBON CABLE $369.88 Add to Cart