flexible tubing, and parts and fittings therefor, made wholly or predominantly of polymers and elastomers, for the containment, routing, and protection of wiring and of tubing conveying gas, fluid, or liquid, and for the containment, routing, and protection of fiber optic cables and mechanical linkages and cables

flexible metal tubing and end fittings therefor; metal hardware; namely, cable glands, adaptors, unions, elbows, reducers, enlargers, thread converters, clips lock nuts, lock rings, and end seals