Blocks
A much bigger block with a cavity/hole going through the center.
Quarry Products
4" clean large stone
Drainage stone-small smooth rounded stone
A tonne bag of sand.
Gravel
Aggregate mix
Chips
Concrete block that weighs one tonne.
Regular 4" block with a 90 degree offset.
Regular 4" block with a 30 degree offset.
Bags
Small empty heavy duty sand bag.
Plastering sand