Dernord Heating Element Submersible Water Heater Element Stainless Steel Immersion Heater with 1 Inch NPT Fitting 24v 600watt<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>24v DC heater connects with batteries， solar panels， hydroelectric generators and wind turbine dump</li><li>1" NPT flange fits USA standard water tank or your own custom heater tank</li><li>Easy to install for heater parts，Stainless steel surface has electropolish</li><li>UL and cUL listed to the safety standards</li><li>Supplied with silicon sealing washer which is flexible and waterproof</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41RwHNqOyZL.jpg" noproxy>