Pipe couplings and fittings, all not of metal; rubber sleeves for protecting parts of machines; connectors of plastics for pipes; pipe end caps made from plastics; insulating splice covers for electrical cables and cable bridges of rubber for protecting cables; flexible tubes of plastic; hose pipes made of rubber; hose pipes made of rubber substitutes; rings of rubber for use as pipe connection seal; pipe gaskets; weatherstripping compositions, namely, sealants in the nature of caulk for use ...