Pentair 460799Z Silicone Nitride Igniter Replacement Kit MiniMax NT Pool and Spa Heater Igniter kit replacement Fits Pentair MiniMax NT STD pool and spa heater with 6800 controller model 200, 250, 300, 400 Also fits Pentair MiniMax NT TSI pool and spa heater with 6800 controller models 200, 250, 300, 400 Made of silicone nitride