A tonne bag of sand.
A tonne bag of sand made up in store and ready to be collected.
Blocks
A much bigger block with a cavity/hole going through the center.
Regular 4" block with a 30 degree offset.
Gravel
Clause 804
Bags
An empty small bag.
Regular sized blocks used for most building jobs.
Quarry Products
4" clean large stone
Screenings-Very dusty gravel
Chips
2" clean medium sized stone