Amazon.com : TRM Self-Regulating De-Icing Roof Heating Cable for Ice Dam Prevention and Snow Melting, Direct Plug-in Wire for Ice Melt and Heat Tracing Systems 120V, Length 100 Feet + 6 Feet
Milestones:Polymer Self-Regulating Heat-Tracing Cable, 1972 - Engineering and Technology History Wiki
Amazon.com: MAXKOSKO Heating Cable for Pipe Freeze Protection, Self-Regulating Heat Tape for Water Pipes for Metal And Plastic Home Pipes, Energy-Saving Heat Trace Cable Keeps Water Flowing at -40°F, 18Ft. 120V :
Self Regulating Heat Trace Cable, SR Pipe Heating Tape manufacturer
T-Links- Leominster, Massachusetts
XL-Trace Self-Regulating Heating Cable - Conklin Metal Industries