Drainage stone-small smooth rounded stone
4" clean large stone
2" clean medium sized stone
An empty small bag.
Regular 4" block with a 30 degree offset.
An empty big bag.
Small empty heavy duty sand bag.
A much bigger block with a cavity/hole going through the center.
3/8" Chips. Very small stones
A tonne bag of sand.
The bigger thicker blocks up from the 4"