Small empty heavy duty sand bag.
Drainage stone-small smooth rounded stone
A much bigger block with a cavity/hole going through the center.
Screenings-Very dusty gravel
Regular 4" block with a 30 degree offset.
4" clean large stone
An empty big bag.
Concrete block that weighs one tonne.
A tonne bag of sand.
2" clean medium sized stone
3/8" Chips. Very small stones