Balboa AX40 Overlay [Aux/Black] (17688) gptools Using the correct assembly helps

Using the correct assembly helps maintain compatibility while keeping future service access intact

Improves replacement fit and operating reliability

6 inch hole size supports intended shell fit

An LC cord helps connect compatible low-current single-speed outputs inside a spa control system

Balboa AX40 Overlay [Aux/Black] (17688) gptools Using the correct assembly helpsThe Balboa AX40 overlay is designed for compatible auxiliary topside applications where the original graphic control layer needs replacement. An overlay is useful because it helps identify button functions clearly while restoring the finished appearance of the topside panel, supporting easier and more intuitive operation. This replacement is especially useful when the original overlay is faded, peeling, cracked, or no longer legible. Matching the