Insulators for cables; Insulators for electric mains; Non-metallic tube junctions; Fire resistant insulating materials; Insulating refractory materials; Plastics insulating materials; Insulating materials in the form of sheathing; Insulating materials in the form of bushings; Insulating materials for cables; Insulating materials; Insulating materials in the form of tubes; Insulating materials in the form of sleeves; Fire collars and wraps containing fire resistant sealing, packing or insulating materials, for use with pipes; Insulating materials for electrical purposes; Electrical insulating materials; Cable protectors of insulating materials