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.
Bags
An empty small bag.
Gravel
Aggregate mix
Chips
3/8" Chips. Very small stones
Blocks
Concrete block that weighs one tonne.
Regular 4" block with a 90 degree offset.
Quarry Products
Plastering sand
Screenings-Very dusty gravel
Regular sized blocks used for most building jobs.
2" clean medium sized stone
Regular 4" block with a 30 degree offset.
Clause 804