The leads on all standard Nuheat mats and cables are 10 ft long. Custom mats can be created with leads up to 22 ft in length.
We also carry Nuheat lead extension kits that can extend an existing lead up to 10 ft longer. If you need to add less than 10 ft, cut the existing lead short and splice the extra 10 ft onto it using the extension kit. Do not cut or shorten the extension cord.