The R.C. Musson Rubber 500 Series, is our Heaviest Duty Stair Tread we sell. The stair tread features a 5/16″ thick nose, and is 12-1/2″ deep with an inside drop of 1-1/8″ for the nose. The exclusive rectangular design enhances safety, durability and ease of maintenance. This rubber stair tread is ideal for universities, schools, hospitals, banks, theaters, hotels, factories, airports, restaurants and shopping malls, or any were there is heavy traffic. They come in standard widths of 36″, 42″, 48″, 54″, 61″ and 72″, and are easily sized to fit in the field with a straight edge and a utility knife. They are offered in 16 different colors. If you have any questions on this stair tread, the R.C. Musson 500 Series Rubber Stair Tread, or any other flooring product we offer, please email or call our Flooring Experts.