HTG Heat-Treated Fiberglass Sleeving is braided with non-alkali fiberglass with wax fined out and waves set, then impregnated with silicon.

It can resist high temperature to 450 ceti degree. The normal breakdown voltage is 800V at least, and color is
white, grey and black,but more another color can be available upon request.
Usually, the package  is made by roll or 1 meter cutting.

It's used as wire insulation and protection when high working temperature required.