only what you see in pictures.

4.0KW 240V Replacement heater element compatible with any swim spa controllers or spa packs that takes a universal hi-flo element. fit for 2" stainless steel flow thru tube spa heater manifolds including products made by Balboa, Gecko, Spa Builders, Hydro Quip, ACC, Acura Spas, Len Gorden, Coleman, Watkins, Dimension One, and many othersReplacement for Balboa Heating Element Hot Tub Heating Elements compatible with any swim spa controllers or spa packs that takes a universal hi-flo element. Replaces 58104 (4kw）12-0100-K (5.5kW), 12-0101-K (4.5kW), 12-0102-K (4.0kW), 6-flo, 4-FLO 25-4030, 20-3440, 25-4044. 12-0101f-K, 12-0102f-K, 12-58269-K, 12-58270-K, 12-58271-K, 12-58272-K, 12-58273-K , 12-58274-K, 2-00-5001.

Not Includes Hardware Kit.