MiniMax Heater Gasket Fin Tube Seal made by Pentair 070951 9 gaskets needed. Used On the models MiniMax NT STD with 6800 Controller Model Nos., 200, 250, 300, 400. MiniMax NT STD with DDTC Controller Model Nos., 200, 250, 300, 400. MiniMax NT TSI Heater, with 6800 Controller Model Nos., 200, 250, 300, 400. MiniMax NT TSI Heater with DDTC Controller Model Nos., 200, 250, 300, 400. MiniMax Plus Heater MiniMax CH Heater Model Nos., 150, 200, 250, 300, 350, 400. MiniMax NT LN with 6800 Controller Model Nos., 200, 250, 300, 400. MiniMaxNT LN Heater with DDTC Model Nos., 200, 250, 300, 400. PowerMax Heater Model Nos., 150, 200, 250, 300, 350, 400. The package includes 9 gaskets.