The 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 correct auxiliary black AX40 layout helps preserve intended fit and restore dependable control labeling in a clean, finished format.The 17688 is a practical service part when a compatible Balboa topside setup needs an overlay to restore clear button identification and a premium finished look. Balboa AX40 overlay Auxiliary black layout Designed for compatible topside control applications Useful when the original overlay is worn or unreadable Supports cleaner and more dependable control presentation