Item: Granite Stair/ Granite Step/ Marble Stair/ Marble Step/ Granite Riser/ Marlbe Riser Step and riser are widely used for building, house. Common size: Steps: 120(L)X34(W)X3CM(T) Risers: 120(L)X17(W)X2CM(T) Customized specification are also accepted. Finished: Topside polished or flamed with one long edge Full bullnose or straight polished Risers always finished by four edges sawn Surface: A) 3 channel of anti slip at size 5mmx5mm B) One anti slip of bushhammered, flamed or sandblasted at wildth 3-5cm Tolerance in thickness: +/-1mm We guarantee: Best quality, Low price, Fast production, Strong and Safe package. Any further information, please don't hesistate to cotnact us. Thank you!