This 279.4mm, 3kW Incoloy Tesla immersion heater is designed for use in medium-to-hard water areas. It is supplied with a 177.8mm dual safety thermostat and is suitable for use with copper and stainless steel cylinders. The unit is fully approved and tested to EN60335-2-73. The thermostat is also independently approved by BEAB to EN60730-1. Complies with the latest European standards. BEAB approved factory and BEAB approved product. Dual safety thermostat included. Standard 2 1/4" Head. Suitable for hard and soft water areas.