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
Concrete block that weighs one tonne.
Chips
3/8" Chips. Very small stones
Quarry Products
4" clean large stone
Regular 4" block with a 90 degree offset.
Bags
An empty big bag.
A tonne bag of sand.
The bigger thicker blocks up from the 4"