DERNORD 12V 500W Immersion Heater Submersible Water Heater Element Stainless Steel Heating Element with 1 Inch NPSM Fitting Double U Type

12v DC heater connects with batteries, solar panels, hydroelectric generators and wind turbine dump, 1" NPSM flange fits USA standard water tank or your own custom heater tank, UL and cUL listed to the safety standards, Stainless steel surface has electropolish, Supplied with silicone sealing washer which is flexible and waterproof