Armstrong Ceilings Prelude 30-Pack 12-ft White Metal Smooth Wall Moulding Ceiling Grid TrimHot dipped galvanized coating inhibits red rusting better than electrogalvanized or painted systems Hemmed angle moulding with prefinished exposed flanges 360 linear ft per carton (30 pieces per carton) High recycled content Suspension system 10 year limited warranty 144 in x 7 8 in x 7 8 in Easy to cut and field modify to suit job conditions using standard tools Features Series Name Prelude Type Wall moulding Style Smooth Length (Feet) 12 Width