Flexible and Non-Metal Tubes and Plastic Tubing for Use in Decoration or Identification of Pipes, Central Heating Pipes or Electrical Cabling; Insulating Materials for Use in Cladding; Insulating Materials Adapted to Incorporate Cladding; Insulation in the Nature of Lagging Materials for Use on Pipes, All Such Material Made of Plastics, Rubber, Cloth, Vinyl, Ceramics, Synthetic Fabrics or Fibreglass