Select Series 3 Anodised Recess Stair Nosing with Black Carborundum Infill $47.50 per lineal metre plus GST Tactile Systems Australia Select Series 3 Recess stair nosing features clear anodised aluminium matched with a high-grade carborundum insert. The Select Series 3 Recess stair nosing features high grade aluminium construction with a carborundum insert. A P5 slip rating from a NATA approved laboratory, tested to AS 4586. This Select Series nosing type is recess mounted, suitable for indoor or outdoor applications. Select options