A tonne bag of sand.
A tonne bag of sand made up in store and ready to be collected.
Chips
3/8" Chips. Very small stones
Blocks
A much bigger block with a cavity/hole going through the center.
Gravel
Aggregate mix
Screenings-Very dusty gravel
Regular 4" block with a 30 degree offset.
Bags
An empty big bag.
Regular sized blocks used for most building jobs.
Small empty heavy duty sand bag.
Clause 804