Armstrong Ceilings Prelude Plus LD Natural Aluminum 20 Pack 144 in Aluminum Ceiling Grid Main Beam Color:Natural Aluminum 1 Electronic Mechanical Mechanical Security ANSI Grade 1 Electronic Mechanical Mechanical Security ANSI Grade ANSI Grade 2 (Better) Included Hardware ergonomic handle that offers users greater comfort during prolonged use and an onboard hose storage and shoulder strap for convenience with less mess 9375 Material Aluminum Rust Resistant Yes Package Quantity 20 Commercial Residential Commercial Residential Color Finish Family Silver Manufacturer Color Finish Natural Aluminum Warranty 10 year limited UNSPSC 30161600 CA Residents: Prop 65 Warning(s) No 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