Electrical Supplies
Heating 24V Cartridge Heater DN20 Cylindrical Immersion Water Heating Element Water Heater 1/2" Thread 100W/200W(100W 15.8x100mm)
Tube Material: SUS304 Wattage: 100w/200w Tube Length: 100mm Wire:300mm Thread:DN15=1/2"(21mm)
https://www.bizrate.co.uk/electricalsupplies/heating-24v-cartridge-heater-dn20-oid40095574653.html