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.
Quarry Products
4" clean large stone
Drainage stone-small smooth rounded stone
Blocks
A much bigger block with a cavity/hole going through the center.
Concrete block that weighs one tonne.
Chips
3/8" Chips. Very small stones
A tonne bag of sand.
Plastering sand
Gravel
Clause 804
Regular 4" block with a 90 degree offset.