Elgena KB3 12V Water Heater - 200W Element | LKQ Nova Leisure
Dernord 12v 600watt DC Immersion Heater Submersible Water Heater Element Stainless Steel Heating Element with 1 Inch NPT Fitting Double U Type : Amazon.co.uk: DIY & Tools
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6 Litre slimline 12v/240v Motorhome Water Heater (NO COIL)