SPK-35-50, Reddy Heater Spark Plug, Fits Models B30, B30c, B50a, B50b, B50d, B50e, B50f, B50g, Blp45, Blp80, Blp150, C35, C35a, C35b, C50d, C50e, C50f, F30, F50a, F50e, F50f, F50g, K30, K50a, M30, M50a, R30, R35, R35a, R35b, R50, R50a, R50b, R55, R55m, Rem35, Rem35a, Rem50, Rem50a, Rem50aw, Rem50b, Rem50w, Rem55, Rem55-W, Rlp45, Rlp80, Rlp150, Vlp45, Vlp80 & Vlp150.