Block dimensions:12″HIGH X 17″LONG X 4″THICK
Blocks
A much bigger block with a cavity/hole going through the center.
The bigger thicker blocks up from the 4"
Quarry Products
Plastering sand
Gravel
Aggregate mix
Concrete block that weighs one tonne.
Clause 804
4" clean large stone
A tonne bag of sand.
Regular sized blocks used for most building jobs.