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
Quarry Products
2" clean medium sized stone
Drainage stone-small smooth rounded stone
Bags
Small empty heavy duty sand bag.
Chips
The bigger thicker blocks up from the 4"
Concrete block that weighs one tonne.
4" clean large stone
Plastering sand
Regular sized blocks used for most building jobs.