This stair nosing system is a triple component nosing designed for indoor / outdoor application and is suitable for heavy-duty pedestrian traffic. In-situ installation makes this product most desirable for heavy-duty applications and is designed for use with poured or precast concrete, terrazzo, steel pan cement filled stairs. A mixture of carborundum chips and epoxy is filled in 2/5" (10mm) wide compartments for robust design and rapid response. It has a unique top design that can be easily replaced during maintenance phase, without disrupting the traffic or causing damage to the stair.