Blocks
A much bigger block with a cavity/hole going through the center.
Quarry Products
Drainage stone-small smooth rounded stone
The bigger thicker blocks up from the 4"
Gravel
Aggregate mix
Regular 4" block with a 90 degree offset.
A tonne bag of sand.
Bags
An empty small bag.
Chips
3/8" Chips. Very small stones
Clause 804