3 main types are:
Grey Granite
Bush Hammer finish: 600x300x30 ; 600x400x30 ; 600x600x30; 600x900x30
Flamed finish: 600x300x20; 600x400x20;600x600x20;600x900x20
Brown Granite
Bush Hammer finish: 600x300x30; 600x400x30; 600x600x30; 600x900x30
Black Granite
Flamed finish: 600x400x20;