... treads Advantages: 1). Factory direct, Quarry owner 2). Ten years experience. 3). Good packing Natural ... , white, black, yellow, green, red, brown and etc.; 2.Standard Size: Step,100-150x33cm, Riser,100-150x17cm, ... , 3cm and ect.; 4. Finish: Polished, honed, flamed, sandblasted, bush-hammered, anti-slip strip, bronze bar etc.; 5 ... , monument, etc Natural stone stair treads with low price and A grade