17
Non-metallic couplings for pipes, Casing, Clips and covers for pipes, not of metal, Sleeves, Reducers, T-pieces, elbows not of metal, Pipe fittings, not of metal, non-metallic gaskets, Rings (Water-tight -), Seals, Branch wires not of metal, Insulating materials, Stopping and insulating materials of rubber or plastic, Insulation sheets, Sound proofing materials, Lute, Pipe muffs, not of metal, Flexible pipes, not of metal, Non-metallic hose clamps; Non-metallic insulated pipes; Non-metallic insulated pipe jackets; Non-metallic insulated pipe jackets; Tubes (Non-metallic -) for irrigation; Non-metallic underground tubing; Sealants for repairing leaks in water cooling systems; Polystyrene panels for insulating purposes; Boards of polyester resin, Sealant compounds for joints, Adhesive tapes, other than for medical, stationery or household use, Insulatory coatings of plastic resin, Glass wool for insulation, Rock wools for insulation, Fibres for insulating purposes, Rings (Water-tight -)
19
Flashing, not of metal, for building; Framework, not of metal, for building; Building materials, not of metal; Boards made of wood particles; Boards of gypsum plaster; Concrete slabs; Cover plates being the tops for manholes, containers, separators and other underground installations of plastic; Reinforced concrete manhole covers; Branch boxes, not of metal, for pipework