Door Threshold, Surface Type Fluted Top, Mill Finish, Color Aluminum, Width 9 in, Height 1/2 in, Length 4 ft, Fits Door Width 48 in, Thickness 0.109 in, Material Aluminum, Standards ANSI/BHMA A156.21, ANSI/BHMA, CAN/ULC S104, IBC, ICC/ANSI A117.1, NFPA...