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.
Chips
3/8" Chips. Very small stones
Quarry Products
2" clean medium sized stone
Concrete block that weighs one tonne.
Regular 4" block with a 30 degree offset.
Gravel
Screenings-Very dusty gravel
Plastering sand
Bags
An empty small bag.
Clause 804