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.
Chips
3/8" Chips. Very small stones
Bags
Small empty heavy duty sand bag.
Quarry Products
Plastering sand
Blocks
A much bigger block with a cavity/hole going through the center.
4" clean large stone
Concrete block that weighs one tonne.
Regular 4" block with a 30 degree offset.