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
The bigger thicker blocks up from the 4"
Regular 4" block with a 90 degree offset.
Regular sized blocks used for most building jobs.
Bags
An empty small bag.
Concrete block that weighs one tonne.
Gravel
Screenings-Very dusty gravel
Quarry Products
Drainage stone-small smooth rounded stone
Plastering sand
Clause 804