A much bigger block with a cavity/hole going through the center.
They are a much bigger block than the 4″ and 6″ blocks with a cavity/hole going through the center of the block. Sold in bales of 20 or by single blocks on their own.
Gravel
Aggregate mix
Quarry Products
4" clean large stone
Blocks
Regular 4" block with a 90 degree offset.
Drainage stone-small smooth rounded stone
Concrete block that weighs one tonne.
A tonne bag of sand.
Plastering sand
The bigger thicker blocks up from the 4"
Clause 804
Bags
An empty big bag.
Regular sized blocks used for most building jobs.