[ Fiberglass for insulation; fittings, not of metal, for compressed air lines, namely, plastic caps and fittings for valves; ] flexible hoses, not of metal; flexible pipes, not of metal; flexible plastic conduits for plumbing purposes; [ flexible plastic hoses for use with ventilation systems; flexible plastic pipes for conveying natural gas; ] flexible plastic pipes for plumbing purposes; flexible tubes, not of metal; flexible tubes of plastic; [ foils of metal for insulating; glass wool for...

MANUALLY OPERATED METAL VALVES, NAMELY BALL VALVES, RADIATOR VALVES, TOW AND FOUR-WAY VALVES, SAFETY VALVES, GATE VALVES, AND CHECK VALVES