Quarry Products
Plastering sand
Gravel
Aggregate mix
Bags
An empty small bag.
Blocks
A much bigger block with a cavity/hole going through the center.
The bigger thicker blocks up from the 4"
Small empty heavy duty sand bag.
Regular 4" block with a 90 degree offset.
Chips
Regular 4" block with a 30 degree offset.
Clause 804