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