Two Component (Replaceable) Nosings in Supergrit® provide fast, easy replacement with great aesthetics and durability. The premium quality construction of these nosings offers maximum durability with no clatter and an architecturally clean design. Super bright Photoluminescent (glow-in-the-dark) anti-slip stair tread that meets 2015 IFC code compliance. Nosings can be furnished with disposable wood insert for use during the construction phase. After construction nosing inserts are installed for a fresh, clean appearance.