An empty small bag.
An empty small bag which can be filled with 4 stone weight of sand, gravel or chips. Bought on its own as an empty bag.
Blocks
Regular sized blocks used for most building jobs.
The bigger thicker blocks up from the 4"
Bags
An empty big bag.
Concrete block that weighs one tonne.
Quarry Products
2" clean medium sized stone
Regular 4" block with a 30 degree offset.
A much bigger block with a cavity/hole going through the center.
Chips
Gravel
Screenings-Very dusty gravel