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.
Blocks
Concrete block that weighs one tonne.
Quarry Products
A tonne bag of sand.
Regular sized blocks used for most building jobs.
The bigger thicker blocks up from the 4"
4" clean large stone
Chips
Bags
Small empty heavy duty sand bag.
Gravel
Aggregate mix
Regular 4" block with a 90 degree offset.
Clause 804