An empty small bag.
An empty small bag which can be filled with 4 stone weight of sand, gravel or chips. Bought on its own as an empty bag.
Blocks
A much bigger block with a cavity/hole going through the center.
Gravel
Aggregate mix
Quarry Products
4" clean large stone
Regular 4" block with a 90 degree offset.
Bags
An empty big bag.
A tonne bag of sand.
Small empty heavy duty sand bag.
Drainage stone-small smooth rounded stone
Screenings-Very dusty gravel
Regular sized blocks used for most building jobs.