Many kinds of granite and marble Stair Step with different materials and different surface treatment can be offered. 1.Stair Step / Stair Tread 1) size: 110-150 x 30-33cm or 100 x 35 x 15cm 2) Finishes: a) top polished, with edges bevelled and polished b) top flamed /bushhammered/sandblasted with anti-slip line, others with edges bevelled and polished. 2. Stair Riser 1) size: 110-150 x 14-15 (cm) 2) Finishes: Top polished, others sawn cut. Other sizes are available upon your request