Fiber casing, also known as fiberglass, Fiber high temperature casing, ceramic Fiber casing. Fiber casing is a casing reinforced by glass Fiber, suitable for continuous high-temperature operation at 538 ° C.Its insulation and low price are the most economical choice to protect hoses and cables.Fiberglass bushing can be divided into three types according to the technology: single-layer fiberglass tube, fiberglass tube with external glue and external glue, and fiberglass tube with internal glue and external glue.Voltage resistance classes are: 1.2kV, 1.5kV, 4kV, 7kV, etc.