Stair Tread Step rizer, model step,double step,2cm,3cm,3+3cm,4+4cm Finishing:Polished,Flamed,Honed,Bushhammered,Sandblasted, Stair Tread SpecificationStone step 2cm and 3cm, double step 3 ... do templet for customer.Ordinary do 3+3cm thickness double step.The fiber and glue are from Germany.Advantage1) More than ...