Fit for MasterTemp 200, MasterTemp 250, MasterTemp 300, MasterTemp 400, SR200NA, SR333NA, SR400NA, SR200HD, SR333HD, SR400HD, 460805 and compatible with All NA and LP Seri. 472610Z Switch Membrane Pad. 472610Z membrane pad fits for MasterTemp pool/spa heater electrical system switch membrane pad replacement. Begin by removing the old circuit board by shutting down all power and opening the top of the heater tohave access to the old board. Unplug the membrane pad from the board and remove the wire connectors connected to the old board. Unscrew the 4 screws holding the board in place. This will allow you to take the old board completely out. Screw the board back in and plug the membrane pad into the connection that accepts the ribbon cable. Reconnect all of the wire connections and close out your master temp or max e therm heater. Our customer service will respond to all questions within 24 hours. We keep the same pace with current trend and introduce the latest goods to meet your demands. We’re committed to offer quality products and provide world-class service. Visiting our shop will be a good journey and your correct choice; you will get the quality product with reasonable price. It’s our pleasure to do business with you and we hope you’re satisfied with our products and services. We’ll try our best to assist. Your positive comments are of vital importance to us! OR, you may choose to have a replacement. Once you get the item please inspect it and make sure you get exactly what you paid for.