8mm Width 20W/m can be used inside pipes Self-regulating Freeze Protection Heating Cable/Hot wire for defrost, snow melting,etc.
https://www.vogueparade.com/shopping/EN/200366148/1/1005003718302507/8mm-width-20wm-can-be-used-inside-pipes-self-regulating-freeze-protection-heating-cablehot-wire-for-defrost-snow-meltingetc//