Bags
Small empty heavy duty sand bag.
Blocks
Concrete block that weighs one tonne.
Chips
3/8" Chips. Very small stones
Gravel
Clause 804
Regular 4" block with a 90 degree offset.
Quarry Products
A tonne bag of sand.
4" clean large stone
Regular sized blocks used for most building jobs.
A much bigger block with a cavity/hole going through the center.