Armstrong Ceilings Prelude Plus LD Natural Aluminum 20 Pack 144 in Aluminum Ceiling Grid Main Beam Contractor Tools DRIVES: Adhesive collated 16 gauge finish DRIVES: Adhesive collated 16 gauge finish nails ELIMINATES THE NEED: Fully cordless design eliminates the need for compressors That's why we have chosen to work only with top quality materials and verified suppliers 12 ft LD Main Beam All aluminum for maximum moisture resistance Natural Aluminum in color Rotary stitched web for additional torsional strength and extra stability 240 linear ft per carton (20 pieces per carton) Suspension system 10 year limited warranty Typical applications include indoor swimming pools with proper ventilation and non magnetic areas MRI suites 144 in x 15 16 in x 1 1 2 in Series Name Prelude Plus XL Aluminum Type Main beam Height (Inches) 1