Block dimensions:12″HIGH X 17″LONG X 4″THICK
Gravel
Screenings-Very dusty gravel
Blocks
A much bigger block with a cavity/hole going through the center.
Bags
An empty big bag.
An empty small bag.
Regular 4" block with a 90 degree offset.
Aggregate mix
Quarry Products
4" clean large stone
Plastering sand
Chips
3/8" Chips. Very small stones
Concrete block that weighs one tonne.
Clause 804