Tandur Grey LimeStone - Honed Steps & Risers Tandur Grey LimeStone - Honed Steps & Risers Edge Finish Machine Cut / Bull-nosed Sizes (in cms) 100 x 35 / 120 x 35 / 150 x 35 Thickness (in mm) Without Calibration - 20 - 30 Bottom Calibrated - 20 Application Fire Fighting Staircase / Internal Staircase