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
Regular sized blocks used for most building jobs.
Gravel
Clause 804
Bags
Small empty heavy duty sand bag.
Concrete block that weighs one tonne.
Quarry Products
A tonne bag of sand.
2" clean medium sized stone
An empty small bag.
4" clean large stone
Plastering sand
Regular 4" block with a 90 degree offset.