Regular 4″ block with a 90 degree offset.
Regular 4″ block with a 90 degree offset. Can be bought individually or as a bale of 30.
Blocks
A much bigger block with a cavity/hole going through the center.
Gravel
Clause 804
Quarry Products
2" clean medium sized stone
Drainage stone-small smooth rounded stone
Chips
3/8" Chips. Very small stones
A tonne bag of sand.
4" clean large stone
Plastering sand
Regular 4" block with a 30 degree offset.