Fittings, not of metal, for flexible pipes; Gasket sealer for use in plumbing; Joint packings for pipes; Non-metal sealing rings for use as connection seals; Pipe gaskets; Rings of rubber for use as pipe connection seals; Rubber seals for jars; Rubber stoppers for bottles; Rubber, raw or semi-worked; Sealant compounds for joints; Sealing and insulating materials; Shock absorbing rubber buffers for industrial machinery; Stuffing of rubber or plastic; Synthetic rubber; Washers of rubber or vulc...