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.
Chips
Regular sized blocks used for most building jobs.
Quarry Products
A tonne bag of sand.
Gravel
Aggregate mix
Bags
An empty big bag.
4" clean large stone
3/8" Chips. Very small stones
Regular 4" block with a 90 degree offset.