An empty big bag.
An empty big bag which can hold a tonne of sand, gravel or chips. Bought on its own as an empty bag.
Quarry Products
2" clean medium sized stone
4" clean large stone
Plastering sand
Bags
An empty small bag.
Blocks
A much bigger block with a cavity/hole going through the center.
Regular 4" block with a 90 degree offset.
Chips
3/8" Chips. Very small stones
Gravel
Aggregate mix
Regular sized blocks used for most building jobs.