6 Manually operated metal valves, namely, brass and steel valves; metal tubing, namely, brass and steel tubing; steel bolts; metal structural joint connectors, namely, stainless steel connectors for use with stationary and moveable commercial gas appliances and domestic fireplaces; brass water hose fittings, namely, couplings, and hose ends; tubes of copper alloy, namely, copper tubing for use in automobiles and air brake systems, and in domestic plumbing of water, oil, and gases; metal propane gas cylinders, sold empty; quick disconnect couplings made of metal for use with hydraulic and pneumatic systems; propane tank purge kits comprised of brass couplings for attachment to propane tank and propane appliance or propane plumbing system, metal adapters for use with hydraulic systems being a brass T-connector, manually operated metal valves in the nature of a brass shut-off cock, non-metallic flexible hose, and propane gas regulator; metal hose fittings, namely, hose ends made of brass or steel; brass fuel line fittings; cast brass fittings, namely, connectors, elbows, and joints for use in water, oil, and gasoline plumbing systems; metal tubing, namely, copper and aluminum tubing; brass fittings for automotive, marine, and truck and trailer use, namely, flare fittings, inverted flare fittings, threaded sleeve fittings, sweat fittings, compression fittings, push-to-connect fittings, air shift transmission fittings, air brake fittings, compression air brake fittings, air brake hose couplings, air brake terminal bolts, welding fittings, grease fittings, water hose fittings, swivel adapters, flare adapters, bulkhead adapters, specialty adapters, flange adapters, o-ring boss adapters, o-ring face seals, flareless adapters, and mechanical pipe swivels; brass fittings for use in water, gas, oil, propane and natural gas plumbing systems, namely, flare fittings, inverted flare fittings, threaded sleeve fittings, sweat fittings, compression fittings, push-to-connect fittings, water hose fittings, propane gas fittings, gas appliance orifices, grease fittings, welding fittings, swivel adapters, flare adapters, bulkhead adapters, specialty adapters, flange adapters, o-ring boss adapters, o-ring face seals, flareless adapters, and mechanical pipe swivels; brass and steel fittings, namely, hose barbs and ferrules for automotive, marine, and truck and trailer use