Armstrong Ceilings Prelude Plus Aluminum 20 Pack 144 in Aluminum Ceiling Grid Main Beam Power Insect Killers 77 Returnable 180 Day Cordless Corded 77 Returnable 180 Day Cordless Corded Cordless Included Accessories Blade Guard System 5 watt LED bulbs to bring overhead illumination to your space 3 Speed settings make it easy to maintain your ideal comfort level 12 ft LD Main Beam All aluminum for maximum moisture resistance White 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 5 Length (Inches) 144 Width (Inches) 0