Screwing thread, solar water heaters, element counter-craft accessories. Characteristics: & nbsp; Type: Tubular immersion heating element. & nbsp; Thread: DN25 / 32mm / 1bsp & nbsp; Use: Resistance Solar water heater & nbsp; Material: Stainless steel 304 & nbsp; Material: Sus304 & nbsp; Diameter: 8 mm & nbsp; Total length: 220 mm & nbsp; Volt & amp; watt: 12v & amp; 600w/300W/400W & nbsp; Thread: 1 BSP / DN25 / 32mm