Compatible with Pentair MasterTemp NA and LP Series pool and spa heater electrical systems. Also compatible with Sta-Rite Max-E-Therm NA and LP Series pool and spa heater electrical systems. Compatible with Mastertemp 400, Mastertemp 300, Mastertemp 250, Mastertemp 200, SR200NA, SR333NA, SR400NA, SR200HD, SR333HD, SR400HD, 460805. World-class advanced technology with high quality materials and high accuracy process. Provides high performance, high stability and long-lasting reliability. If your old Starite or Pentair Mastertemp Control Board no longer starts up your heater or the display no longer illuminated, or your pool heater is turning on by itself at random, maybe it is time to get a circuit board and membrane pad replacement! No need for any complicated setup. Simply unscrewed the front and back panels, unscrewed the top, yanked all the connectors out and plugged into new board. Also install this membrane pad in minutes for attachment on end of pad makes installation easy. Direct replacement, Impossible to mess up, suitable for DIY. Replacement NA and LP Series Pool/Spa Heater Electrical Systems & 472610Z Switch Membrane Pad Replacement MasterTemp Pool and Spa Heater Electrical System.