32710 - Concrete block & Brick
3271011 - - Structural block: Lightweight units
3271015 - - Structural block: Mediumweight units
3271017 - - Structural block: Normal weight units
3271018 - - Structural block: Decorative block, such as Screen block, Split block, Slump block, Shadowal block, etc.
3271034 - - Concrete pavers (incl Grid, Interlocking, etc.)
3271051 - - Structural block: Concrete brick
3271XX0 - - Concrete block & Brick (Miscellaneous - Volume)
3271XX2 - - Concrete block & Brick (Miscellaneous - Speciality)