Hard maple solid wood stair steps are staircase accessories 1)PU lacquered or Unfininsed 2)Finger jointed 3)Surface: flat 1)Staircase accessory- Hard maple solid wood stair steps is produced by our professional workers, we also can supply you different wood species of stair treadsl in different thickness, normally the treads we produce are: Chinese teak, oak, maple, beech, ash, rubber wood, teak, ...