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 90 degree offset.
Quarry Products
2" clean medium sized stone
Concrete block that weighs one tonne.
The bigger thicker blocks up from the 4"
Bags
An empty small bag.
Plastering sand
An empty big bag.
Gravel
Clause 804