FSG is an insulating sleeving produced with a thermal process.The fiberglass is impregnated with silicone resin;it is available in four standard voltage: FSG1500 Volt ?FSG2500 Volt ? FSG4000 Volt ? FSG7000 Volt..The thermal treatment and the spcial resin used for this item give this material a very good softness and elasticity, excellent high temperature resistance and good dielectric strength. Size: Inside Diameter Tolerance on Diameter Wall thickness FSG 1500V Wall thickness FSG 2500V Wall thickness FSG 4000V Wall thickness FSG 7000V 0.5 to 3.5 +0.3-0 0.40±0.12 0.41±0.12 0.45±0.15 0.50±0.15 4.0 to 9.0 0.45±0.15 0.46±0.15 0.48±0.15 0.53±0.15 10 to 12 +0.5-0 0.50±0.20 0.52±0.20 0.58±0.20 0.58±0.20 14 to 16 0.68±0.20 18 to 30 +0.8-0 0.70±0.25 0.72±0.25 0.78±0.25 1.20±0.30 Main properties: Properties Results After heating No cracking or detachment of the coating after 8 hours at 275°C. Low temperature No cracking or detachment of the coating after 60 minutes at -50°C. Flame propagation Max 10 sec(According to UL VW-1). Thermal Class: Grade H(220°C-30°C) random peaks of 275°C. Breakdown voltage: According to UL 1441. Packaging: from mm.0.5 up to mm.4 200 meters rolls; from mm.5 up to mm.16 100 meters rolls; from mm.18 up to mm.30 50 meters rolls; Colour:Brick red. (other colours on request)