Snap-in insulating sheath tube is made of high-quality silicone rubber, which has excellent electrical and anti-leakage performance, excellent weather resistance, high mechanical properties, hydrophobicity and hydrophobic migration, excellent high and low temperature resistance, and can be used continuously at-5℃ ~+15℃. It is mainly used for insulation protection of bare wires of empty racks, with reliable performance and convenient and quick installation. Since it has been put into the market, it has been widely used in the insulation protection of bare wires and aluminum stranded wires in electrified railways and power grids. The snap-in silicone rubber insulated sheathed tube is safe and reliable in electrical performance and convenient to install, which is the best solution for insulation protection of high-voltage wires at present.