Elastomers; Latex [rubber]; Gutta-percha; Gum, raw or semi-worked; Weatherstripping compositions; Caulking materials; Mica, raw or partly processed; Plastic substances, semi-processed; Plastic rods and bars; Semi-worked polymer resins; Flexible hoses, not of metal; Substitutes for unprocessed and semi-processed rubber; Substitutes for unprocessed and semi-processed mica; Substitutes for unprocessed and semi-processed gum; Substitutes for unprocessed and semi-processed gutta-percha.;