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
Regular sized blocks used for most building jobs.
Gravel
Clause 804
Quarry Products
2" clean medium sized stone
Regular 4" block with a 30 degree offset.
The bigger thicker blocks up from the 4"
Regular 4" block with a 90 degree offset.
Drainage stone-small smooth rounded stone
Chips
3/8" Chips. Very small stones
Aggregate mix