Rubber, raw or semi-worked; non-metal sealing rings for use as connection seals; plastic film for packing, cushioning, or stuffing purposes, other than for wrapping; nonmetallic flexible hoses; non-conducting materials for retaining heat, namely, fiberglass for insulation; stuffing of rubber or plastic; nonmetallic fittings for hose; materials for insulation, namely, glass fibers for insulation; heat and acoustical composite insulating shield for automobiles and machinery; electrical insulati...