Auto Limit Switch,300F Cu, For Use With Grainger Item Number 2YU58, 2YU59, 2YU60, 2YU61, 2YU62, 2YU63, 2YU64, 2YU65, For Use With Mfr. Model Number FHP0750KCT!FHP0750KCTA!FHP0750T!FHP0750TA!HUHAA320!HUHAA320FC!HUHAA324!HUHAA324FC!HUHAA327!HUHAA327FC!HUHAA348!HUHAA348FC!HUHAA520!HUHAA520FC!HUHAA524!HUHAA524FC!HUHAA527!HUHAA527FC!HUHAA548!HUHAA548FC!PH4!PH5!PH5HW, Fits Brand Marley Engineered Products, Type Protector, For Use With FHP Series!HUHAA Unit Heater!QCH (U Series)!QPH4A and PH5 Series