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.
Bags
An empty big bag.
Blocks
Small empty heavy duty sand bag.
Regular sized blocks used for most building jobs.
Concrete block that weighs one tonne.
Gravel
Clause 804
Quarry Products
A tonne bag of sand.
The bigger thicker blocks up from the 4"
Regular 4" block with a 30 degree offset.
4" clean large stone