DESTU Seal No1 DS1

are designed specifically for the heat Trace range of heating cables and are used as part of the DESTU termination system.
There are 5 seals for the DESTU each seal is specific to a range of cables.
See below:

Heating Cables applicable to DS1

Self-Regulating:

Constant Wattage:
Microtracer EMTF-C
Minitracer MTFJ-C