
The TP400 topside panel has been discontinued. The replacement for this unit is the TP540. The new TP540 will fit in the same size hole, and just have a different button layout.
6 Button TP540:
Balboa - Topside, Genuine BWG TP540, 6 Button, With 17351 Overlay - G8454_17351
5 Button TP540:
Balboa - Topside, Genuine BWG TP540, 5 Button, With 17352 Overlay - G8454_17352
Bullfrog Spas - Topside Panel, TP400 - 65-1905