Stair Material covers stair step and stair rise. They are fabricated by Chinese granite color. Size are available for your requirement. The thickness are available for 2cm and 1.5cm. We can offer you Chinese granite colors and import granite colors , fit for making granite stair step , granite stair riser , and cut to you customized sizes . Regular size is stair tread: 120x33x2cm, stair rise : 120x17x1.5cm Material: G687, G603, G562,G664, G640, G654, G682, ...... Chinese fashion granite colors are offering on http://www.stone-export.com , pls visit it and contact me bk@stone-export.com Thanks!