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
Clause 804
Blocks
Regular sized blocks used for most building jobs.
Quarry Products
4" clean large stone
A tonne bag of sand.
Regular 4" block with a 90 degree offset.
Chips
3/8" Chips. Very small stones
Drainage stone-small smooth rounded stone
Regular 4" block with a 30 degree offset.