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
Chips
3/8" Chips. Very small stones
Regular 4" block with a 90 degree offset.
Quarry Products
4" clean large stone
Gravel
Screenings-Very dusty gravel
Aggregate mix
Drainage stone-small smooth rounded stone
A tonne bag of sand.
Regular sized blocks used for most building jobs.