High Voltage Heat Shield Silicone Rubber Coated Fiberglass Insulation Tubing Sleeve. Customized Thickness: Available in 1mm-30mm or fully customized dimensions to fit specific needs. High Voltage Insulation: Designed for electrical insulation with a maximum voltage rating of less than 10KV. Heat Resistance Class F: Withstands high temperatures with a thermal rating of F 155 for reliable performance. Superior Material Quality: Made from alkali-free glass fiber coated with acrylic resin for excellent insulation. Flexible and Durable: Features good softness, elasticity, and chemical resistance for easy installation. ISO9001 Certified: Manufactured under strict quality control standards with ISO9001 certification. Factory Direct Supply: Direct sales from manufacturer with 8 production lines and 12000 tons annual capacity. Free Sample Availability: Free samples provided for all sizes; freight cost returned after first deal.