LJXH 1 INCH BSP NPT Heating Element DC Heater 36V 48VScrew in for Solar Energy Wind Power Product Name: Tublar Heating ElementTube Length: 200mmTube Diameter: 8mmThread Size: 1 BSP/NPT (around 32mm)Voltage: DC 36V 48VPower: 300W/600W/900W/1200W/1500WTube Material: 304 stainless steelThread Material: 304 stainless steelPackage Contents: prefer what you need Please Note: Because the heating wire contained in the heater tube is manufactured from OCr25A15 which is Magnetic, it is ordinary that the element would be adsorbed by means of means of magnet. The tube surface supplies is made of stainless steel 304. If you are care about it, please don't make order.