A tonne bag of sand.
A tonne bag of sand made up in store and ready to be collected.
Blocks
A much bigger block with a cavity/hole going through the center.
Regular sized blocks used for most building jobs.
Quarry Products
4" clean large stone
Bags
An empty big bag.
Regular 4" block with a 90 degree offset.
Chips
Gravel
Clause 804
The bigger thicker blocks up from the 4"
Drainage stone-small smooth rounded stone
Concrete block that weighs one tonne.