17 Flexible pipes, tubes, hoses and fittings therefor, namely, valves in the nature of valves of rubber or vulcanized fiber, and fittings for rigid pipes, all non-metallic; seals, sealants and fillers in the nature of non-metal seals for use in the insulation industry, waterproof and silicone sealants, and fillers for expansion joints; insulation and barrier articles and materials in the nature of insulating materials and pipe insulation; unprocessed and semi-processed materials, namely, polyester in the nature of polyester sheets for use in the manufacture of labels, mineral fibers in the nature of carbon fibres not for textile use, elastomers in the nature of elastomer expansion joints, cellulose in the nature of cellulose acetate film used as an industrial or commercial packing material, fibres impregnated with synthetic resins in the nature of semi-worked synthetic plastic and synthetic resins as semi-finished products in form of pellets, rods, foils, foams, fibers, films and sheets, resins in extruded form in the nature of resins in extruded form for general industrial use, semi-worked plastic substances in the nature of plastic substances, semi-processed, membranes and semi-processed synthetic filtering materials in the nature of semi-processed plastics in the nature of filtering materials in the insulation industry, adhesive tapes, strips, bands and films in the nature of adhesive tapes for industrial or commercial use, parts and fittings of all the aforesaid goods