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
Screenings-Very dusty gravel
Blocks
Concrete block that weighs one tonne.
Quarry Products
A tonne bag of sand.
Clause 804
Drainage stone-small smooth rounded stone
2" clean medium sized stone
The bigger thicker blocks up from the 4"
Aggregate mix
Regular 4" block with a 90 degree offset.