Blocks
The bigger thicker blocks up from the 4"
Bags
Small empty heavy duty sand bag.
Gravel
Screenings-Very dusty gravel
An empty big bag.
Regular 4" block with a 90 degree offset.
Aggregate mix
Concrete block that weighs one tonne.
Regular sized blocks used for most building jobs.
Regular 4" block with a 30 degree offset.
Clause 804
Quarry Products
A tonne bag of sand.
A much bigger block with a cavity/hole going through the center.