Silicone Coated Fiberglass Sleeving 1.1500-4000 Volt 2. 155 Temperature strength 3.ID 0.8-30mm ... good dielectric, self-extinguish, which is widely used for class H electrical machinery, electrical appliance, heating equipments etc. Specifications: Diameter: 0 ... range: -60 ~ 250 ; Colour: white, red, black, yellow, etc 1500-4000 Volt silicone rubber coated fiberglass sleeve