17 Flexible pipes, tubes, and hoses and connectors in the nature of couplings therefor, not of metal; Flexible pipes, tubes, hoses and fittings therefor, namely, valves, and fittings for rigid pipes, all non-metallic; Connectors for hoses, namely, non-metal hose fittings; Hoses adapted for irrigation purposes; Non-metallic couplings for tubes; Flexible plastic tubes for the conducting of liquid media; Non-metallic tube junctions; Flexible hoses, not of metal, for the conducting of water for aquariums; Hose connectors in the nature of non-metal hose fittings, for aquariums; Flexible pipes, tubes, hoses and fittings therefor, namely, valves, and fittings for rigid pipes for aquariums, all not of metal; Hoses, not of metal, adapted for irrigation purposes for terrariums; Flexible pipes, tubes, hoses and fittings therefor, namely, valves, and fittings for rigid pipes for terrariums, all not of metal