Collars of metal for fastening pipes; Copper, unwrought or semi-wrought; Ferrotitanium; Iron slabs; Locks of metal, other than electric; Metal bottle caps; Metal conduit; Metal elbows for pipes; Metal flanges; Metal keys for locks; Metal nipples; Metal pipe connectors; Metal pipe fittings for compressed air pipes; Metal pipe muffs; Metal, wash down spray nozzles for commercial and industrial use; Reinforcing materials of metal for pipes; Screw tops of metal for bottles; Steel, unwrought or se...