Features: Take solid stainless steel welding flange, clean welding and no water leakage Solid material, long service life and trouble-free pouring 1.0mm thick stainless steel tube, not easy to deform for a long time High temperature performance, stable performance and simple structure Suitable for solar energy , air energy and technical water tanks etc. Specification: Item type: heating pipe Material: stainless steel, brass Working voltage: 230V Power: 3 kW, 6 kW, 9 kW, 12 kW (optional) Length: 210mm/250mm/300mm/350mm Pipe diameter: approx. 10mm. Leakage current: 0.5 mA. Thread diameter: DN40 (1 1/2" AG)(47mm) Package contents: 1 x heating tube. 1 x rubber disc. Note: 1. The actual colors of the item may be slightly different from pictures shown on website due to many factors such as brightness of your monitor and light brightness.2.Please allow slight manual measurement deviation for the data.