Step Cover B&Y 1200mm X Up To 345mm - 2137-9334 Nosing, black with yellow or white, highly versatile. Highly versatile, heavy duty GRP performed step covers with nosing. Will tolerate heavy wear and all weather conditions, easy to apply-can be glued or screw fixed. Black tread with 55mm high visibility nosing to comply with building regulations approved document M. Ideal for use inside and out.