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.
The bigger thicker blocks up from the 4"
Bags
An empty big bag.
Gravel
Aggregate mix
Quarry Products
Drainage stone-small smooth rounded stone
A tonne bag of sand.
Chips
Screenings-Very dusty gravel
4" clean large stone