The Balboa AX40 overlay is designed for compatible topside control applications where the original graphic button layer needs replacement. An overlay is useful because it helps clearly identify the available control positions while restoring a cleaner finished look to the panel surface.This replacement is especially useful when the original overlay is faded, peeling, cracked, or no longer easy to read. Matching the correct J1, J2, J3, J4 layout helps preserve intended button identification and supports more dependable day-to-day control use.The 11823 is a practical service part when a compatible Balboa topside setup needs an overlay to restore clear labeling and a more polished control appearance. Balboa AX40 overlay J1, J2, J3, J4 layout Designed for compatible topside control applications Useful when the original overlay is worn or unreadable Supports cleaner and more dependable control presentation