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.
Blocks
Concrete block that weighs one tonne.
Regular 4" block with a 30 degree offset.
Quarry Products
A tonne bag of sand.
The bigger thicker blocks up from the 4"
Chips
Regular sized blocks used for most building jobs.
Gravel
Clause 804
3/8" Chips. Very small stones
4" clean large stone
Bags
An empty small bag.