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; Load distribution rings of concrete for cover plates to be installed on rising pipes of inspection chambers, containers and underground separators; Seals for protecting the inside of manhole pipes from groundwater inflow into wells, containers or underground separators, inspection chambers, not of metal