These glass yarn products have been treated with insulating materials (synthetic resins or silicone rubber). The insulating GRADE is proportional to the thickness of the coating. (from GRADE C3 kv. 0,8-1 to GRADE a kv.8). These products have a good temperature resistance (from 155 to 240°C). In particular we are proud to say that our sleeving T.V.E. 19.70 (made with a glass yarn braided sleeving coated with silicone rubber) has IMQ certification.