Balboa VS500Z Circuit Board, 54369 Replacement Balboa circuit board for the VS500Z spa controller model. OEM part number for the circuit board is 54369-03. SpaGuts P/N: 10-175-4369. Board features: Pump 1 dual speed, Ozone, Circ Pump. Circuit Board dimension: 11 inch x 5 inch This circuit board also replaces the following Balboa circuit boards: 54359 (System 54358), 55264 (System 55263), 54336, 53749, 54365 (System 54364), 53795, 55056, 55140, 53434, 54201 (System 54200), 54351, System 53728, 59005, Chip 165R1A, 53551, 53552, 55032 (System 55031) This item comes with a 1-year manufacturer's limited warranty from the original purchased date. FREE GROUND SHIPPING TO THE 48 US CONTINENTAL STATES