Natural Stone stair,Stone riser 1 Material: granite, marble 2 Tread ... *300-330*30MM 3 Risers:110-150*14-15*2cm Natural Granite stair,stone stair,marble step1.Finish: polished/ flamed/ sandblasted ... edge: beveled,full bullnose,half bullnose,eased polished,etc.;5.Anti-slip line available;6.Polular granite Colors: G603,G633,G654 ...