... Timely design 4,Cut as required Chinese Granite Stone Stairs MaterialsNatural Stone G603 Grey Granite (more materials availalbe: granite, marble, sandstone, travertine, limestone ... ,spiral stairs ,arc stairs Popular stone for steps granite:G603,G636,G664,G687,G654,G562,G682,G684,absolute ... ,honed,bush hammered, sandblasted or customized.Usge Building ,garden ,etc Common sizes tread:110-150 x 30-33 ...