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"
Gravel
Aggregate mix
Regular sized blocks used for most building jobs.
Regular 4" block with a 90 degree offset.
Clause 804
Regular 4" block with a 30 degree offset.
Bags
Small empty heavy duty sand bag.
Chips
Screenings-Very dusty gravel
An empty big bag.