Nautic Boiler B3 - 3.9 Gallon - 12V - 300WCasing in composite material and Tank in Aisi 316 stainless steel.Benefits: High quality materials Heat exchanger with wide exchange surface Produces hot water from the electric element, that is fitted with an adjustable safety thermostat Relief/non-return vale that allows discharging of the water heater in case of disuse Features: The heat exchanger used for Quick "Nautic Boiler B3" is AISI 316L stainless steel. The heat exchang capacity is notably higher than that achieved from other manufactures. The tank is made of 1.5 mm gauge AISI 316 stainless steel welded with Argon shielding gas and hence highly resistant to corrosive agents. The electrical heating element is made of IncoloyA(R). The thermal insulation is high density polyurethane foam injected between the cover and tank giving excellent heat retention properties. Included Accessories:Tank mounting brackets are in stainless steel AISI 316 and are supplied as standard in each package. Specifications: Volts: 12v Heat Exchanger: Yes Gallons: 3.9 Box Dimensions: 16"H x 16"W x 23"L WT: 19.4 lbs UPC: 8057090143966 Brochure (pdf)