The tank of this Quick boiler series B3 is made ??of high quality, stainless steel (1.5 mm wall thickness). The boilers are equipped with a strong foam insulation and a durable plastic casing. These boilers feature a safety / non-return valve and they are equipped with an electric heating element for a power of 500 Watts or 1200 Watts. The B3 boilers are available in various volume sizes. The connection is possible via ½" fittings/nozzles (not included)