Master Spa Circuit Board MS501X  X801162  Balboa 56943.

Chip Number - MS501(X)

Designed for use with Master Spas

Compatible with TP series control panels  This is BP501-X / MX501X board.

4-Pin Molex Connection type for Balboa/Master Spa BP spa packs.

Free shipping.

(does not include expander board X801108)