Balboa G7411-01 M7 4.0Kw Flo-Thru Heater Assembly For BP100
Balboa uses suffixes like -01, -02, -K, etc. to indicate minor manufacturing or connector variations, but the core heater is the same:
G7411-01 is simply a revision of the G7411 heater, typically shipped with retrofit kits or specific OEM spa brands.