oil and gas drilling apparatus; namely, drill collars, integral blade stabilizers, stabilizer mandrels, measurements-while-drilling housings, logging-while drilling housings, non-magnetic drill collars, integral blade non-magnetic stabilizers, non-magnetic flex collars, and parts and fittings for all the aforesaid goods

steel bars for further machining into downhole products for the oil and gas exploration industries

Unwrought and partly wrought common metals and their alloys; ingots, billets, bars, sheets, coils and strips of common metal; forged metal articles and machined metal articles being semi-finished products of common metals; collars, rings, rolls, tubes, flanges, blanks and mandrels not for use with machines of common metals and common metal alloys for industrial use; parts and fittings for the aforesaid goods

Unwrought and partly wrought common metals and their alloys; ingots, billets, bars, sheets, coils and strips of common metal; forged metal articles and machined metal articles being semi-finished products of common metals; collars, rings, rolls, tubes, flanges, blanks and mandrels not for use with machines of common metals and common metal alloys for industrial use; parts and fittings for the aforesaid goods