4000V High-Temperature & High-Voltage Resistant Glass Fiber Sleeve is a high-performance fiberglass sleeve specially designed for insulation protection of medium and high-voltage electrical equipment. This 4000V Glass Fiber Sleeve High-Temperature & High-Voltage Resistant is made of a precision-woven base material of high-purity alkali-free glass fiber, impregnated with a high-voltage insulating coating and processed by a high-temperature curing process. It can stably withstand a 4000V high-voltage breakdown voltage, building a solid pressure-resistant and insulating protection barrier for medium and high-voltage electrical circuits. The High-Temperature & High-Voltage Resistant 4000V Glass Fiber Sleeve has excellent heat resistance, capable of long-term stable operation in an extreme temperature range from -50℃ to 200℃, with a short-term high temperature resistance up to 250℃, perfectly meeting the insulation protection needs of complex working conditions with high temperature and high voltage.