Door Threshold, Surface Type Fluted Top, Aluminum Mill Finish, Color Gray, Width 5 in, Height 1/2 in, Length 4 ft, Fits Door Width 48 in, Material Aluminum, Standards ANSI/BHMA A117.1, ANSI/BHMA A156.21, UL 4L10, Yes, Includes Hardware, UL Fire Rating UL10C.