Wide Applicability: This heater is suitable for Balboa BP Series control systems, such as BP501G1, BP501G3, BP2000G1, BP7, as well as for Balboa VS Series and EL2001 Series control systems, such as VS501Z, VS510SZ, VS520SZ, and EL2001M3. Multiple Model Replacements: It can replace multiple models, including 2-00-7028, 58306, 58306KIT, 58083, 58083K, 26-58083-7S-KS, 26-0807-7S-KS, 2-00-0036C, C2550-0807-TPS, 58209, 58000, 58010, 58123, 58089, 58086, 58105, or X300930, 46-138-1020, 58016, 55473, 58140, 740-0617, 740-0655, 2-00-0049, 55624 Master Spas X300713, 58016, 25-250-0807, 25-200-8083, 26-58083-K, Artesia OP24-0216-08, 25-200-0001, 58237 (5.5KW 825 15IN 1.5 inch), 25-175-1010, and others. High-Quality Materials: Equipped with a 316 stainless steel heater housing and a 5.5KW Incoloy Flo-Thru heater element, it also supports Balboa OEM M7 dual sensors. Easy to Use: The 58083 M-7 Heater Assembly can be used as a replacement heater for spas or hot tubs, featuring its own sensors, front-mounted design for user convenience, and easy servicing.