Gravel
Aggregate mix
Blocks
The bigger thicker blocks up from the 4"
A much bigger block with a cavity/hole going through the center.
Bags
Small empty heavy duty sand bag.
Quarry Products
2" clean medium sized stone
A tonne bag of sand.
Drainage stone-small smooth rounded stone
Clause 804
An empty big bag.
Concrete block that weighs one tonne.