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.
Bags
An empty big bag.
Blocks
Quarry Products
A tonne bag of sand.
Regular 4" block with a 90 degree offset.
Regular sized blocks used for most building jobs.
An empty small bag.
Small empty heavy duty sand bag.
Gravel
Aggregate mix
Concrete block that weighs one tonne.
4" clean large stone
Plastering sand