Features: 6 options available - please read the important information below to find out how to choose the best element for your radiatorFixed heat setting of 43°CFrost and overheating protectionIPX5 rated - read more about IP ratings and why they're essential in our Bathroom Electrical Zones blog66mm length from the thread down55mm diameter clock-shaped face365mm internal probe length2 year guaranteeThere are 6 options available for the Terma 43D heating element. To work out which one you require, multiply the heat output (in Watts) of your chosen radiator by 0.6 and round down to the nearest element. For example, if your radiator has a heat output of 1000W, you would require a 600W element (1000 x 0.6). If you are unsure which element you require, please do not hesitate to contact our sales team