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
Drainage stone-small smooth rounded stone
Regular 4" block with a 90 degree offset.
Gravel
Aggregate mix
Plastering sand
Bags
An empty small bag.
4" clean large stone
Screenings-Very dusty gravel
Regular 4" block with a 30 degree offset.