Armstrong Ceilings SUPRAFINE XL 9 16" Main Beam, 144 in, Hot‑Dipped Galvanized Steel, 20 Pack Berry 50 Maximum Blade Width 3 4" Item Weight:.625 50 Maximum Blade Width 3 4" Product Height (in A: The laminate sheet ships rolled in a box to protect it during transit durable grid that installs efficiently and looks impeccably modern Specification Details Series Name SUPRAFINE XL 9 16" Exposed Tee Component Type Main Beam Profile Type Exposed Tee Face Profile 9 16" Length 144" Material Hot dipped Galvanized Steel Duty Rating Heavy Duty Rout Slot Spacing 6" Cross Tee Main Beam Interface Flush fit End Detail Coupling Height 1 11 16" Pieces per Carton 20 Feet per Carton 240 ft Hanger Spacing 4' 16