32970 - Nonclay refractories, except dead-burned magnesia
3297012 - - Silica brick & Shapes
3297013 - - Magnesite-carbon brick & Shapes, <7% carbon, predominantly Pitch or Resin bonded
3297014 - - Magnesite-carbon brick & Shapes, =>7% carbon, predominantly Pitch & Resin bonded
3297015 - - Magnesite brick & Shapes, Burned & Unburned (excl carbon impregnated magnesite brick)
3297017 - - Carbon impregnated magnesite brick & Shapes
3297019 - - Magnesite-chrome brick & Shapes, High fired (=>3050F)
3297020 - - Magnesite-chrome brick & Shapes, except high fired + Burned & Unburned brick as well as chrome brick
3297025 - - Basic pouring pit refractories + Sleeves, Nozzles, Runners, Tuyeres & Ladle gate parts, excl molten cast
3297033 - - Graphite crucibles, Retorts, Stopper heads & other Shaped refractories containing natural graphite
3297035 - - Carbon refractories, Brick, Blocks & Shapes, excl those containing natural graphite
3297039 - - Nonclay refractories: Brick & Shapes: Carbon & Graphite crucibles, Retorts, Stopper heads, Brick, Block & other Shaped refractories, incl Natural graphite refractories
3297048 - - Silicon carbide kiln furniture (made predominantly of Silicon carbide)
3297049 - - Silicon carbide bricks & Shapes (made predominantly of Silicon carbide) except kiln furniture
3297052 - - Mullite brick & Shapes (made predominantly of Synthetic or Fused mullites, excl molten cast)
3297053 - - Extra-high alumina refractory brick & Shapes & Extra-high alumina pouring pit refractories
3297054 - - Extra high alumina brick & Shapes (made predominantly of Fused & Synthetic aluminas, excl molten cast)
3297055 - - Zircon & Zirconia brick & Shapes (made predominantly of either of these materials)
3297056 - - Extra high alumina pouring pit refractories + Sleeves, Nozzles, Runners, Tuyeres & Ladle gate parts
3297057 - - Dolomite & Dolomite-magnesite brick & Shapes & other Brick containing a substantial amount of Dolomite grains
3297058 - - All other Nonclay refractory brick & Shapes, incl Basic pouring pit refractories
3297059 - - Molten cast shapes + all chemical compositions produced by this method of Manufacture
3297060 - - Brick (General) & Shapes + Forsterite, Forsterite magnesite, Pyrophilite, Pyrophilite-zircon & all other Brick
3297061 - - Mortars: Basic bonding mortars (made predominantly of Magnesite or Chrome ore)
3297062 - - Mortars: Extra high alumina mortars (made predominantly of Fused or Synthetic alumina & Mullite)
3297063 - - Mortars: other Nonclay mortars (Forsterite, Zircon & Silica)
3297064 - - Extra high alumina plastics & Ramming mixes made predominantly of Fused or Synthetic aluminas & Mullite
3297065 - - Basic castables, Plastics & Ramming mixes (Wet & Dry types)
3297066 - - Extra high alumina phosphate bonded plastics & Ramming mixes made predominantly of Fused or Synthetic aluminas & Mullite
3297068 - - Extra high alumina castables (Hydraulic setting, made predominantly of Fused or Synthetic alumina & Mullite)
3297069 - - Nonclay plastics refractories (General) & Ramming mixes (Forsterite, Zircon, etc.)
3297071 - - Gunning mixes: Basic nonclay gunning mixes (+ Chrome, Chrome-magnesia, Magnesia-chrome, Magnesia & Dolomite)
3297072 - - Basic nonclay refractory gunning mixes (incl Chrome, Chrome-magnesia, Magnesia-chrome, Magnesia & Dolomite)
3297073 - - Gunning mixes: other Nonclay gunning mixes (Forsterite, Zircon, etc.)
3297075 - - Ceramic refractory fibers, 1500 to 2000 degrees F
3297078 - - Ceramic refractory fibers, 2001 to 2400 degrees F
3297080 - - Ceramic refractory fibers, 2401 to 2700 degrees F
3297083 - - Nonclay refractories: Unshaped nonclay refractories: Ceramic refractory fibers: 2701 to 3000 degrees F
3297084 - - Ceramic refractory fibers, 2701 to 3000 degrees F
3297085 - - Nonclay refractories: Unshaped nonclay refractories: Ceramic refractory fibers: 3001 degrees F or Above
3297093 - - Nonclay refractory castables (General, Hydraulic setting)
3297094 - - Nonclay refractory materials (General) in lump or Ground form + Ground silica: Direct use by customers
3297096 - - Nonclay refractory materials in lump or Ground form + Ground silica (General): all other Nonclay refractory materials sold as raw materials
3297099 - - Nonclay refractories, except dead-burned magnesia (Miscellaneous)
3297XX0 - - Nonclay refractories (Bulk)
3297XX2 - - Nonclay refractories (Miscellaneous - Speciality)