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.
Chips
Blocks
Regular sized blocks used for most building jobs.
3/8" Chips. Very small stones
The bigger thicker blocks up from the 4"
Bags
An empty small bag.
Concrete block that weighs one tonne.
Regular 4" block with a 90 degree offset.
Quarry Products
A tonne bag of sand.
Regular 4" block with a 30 degree offset.
4" clean large stone
Gravel
Clause 804