... welcome customized sizes 4.low prices 5.free samples marble and granite spiral stairs;design spiral stairsmaterialgranite,marble ,sandstone,travertine, ... white,east white,jade white,dark emperador,light emperador,black and white,bursa beige,moca beige,sunny beige,etc.finishpolished, ... , sandblasted or customized.edgeflat polished,half bullnose,full bullnose,and so oncommon sizetread:110-150 x 30-33 x 2 ...