Sevitsil�® Silicone Tube Is Manufactured in Controlled Environment by Ul94 Approved Silicone Grade. Sevitsil�® Tube Is Designed to Resist U.V Rays, Ozone Gases, Moisture and additionally It Has Outstanding Insulation Properties Material-Silicone Brand-Sevitsil Temperature Range--40 C to 250 C Voltage-1 kv per O.1mm Wall Thickness Dry Insulation Resistance-100,000 Megohms Slit Cut Length-minimum 4 Mm