Blocks
A much bigger block with a cavity/hole going through the center.
Bags
Small empty heavy duty sand bag.
Regular 4" block with a 30 degree offset.
Gravel
Aggregate mix
Clause 804
Regular sized blocks used for most building jobs.
Chips
Quarry Products
2" clean medium sized stone
A tonne bag of sand.
Regular 4" block with a 90 degree offset.