12 ft x 15/16 in Armstrong Prelude XL Exposed Tee ID Main Beam - 7300
12 ft x 9/16 in Armstrong Suprafine XL Exposed Tee ID Main Beam - 7500
12 ft x 1 1/2 in Armstrong Drywall Grid System HD Main Beam - HD8906
12 ft x 15/16 in Armstrong Prelude XL Exposed Tee HD Main Beam - 7301WA
12 ft x 15/16 in Armstrong Prelude XL Exposed Tee HD Main Beam - 7301
12 ft x 15/16 in Armstrong Prelude XL Exposed Tee ID Main Beam - 7300BL
12 ft x 9/16 in Armstrong Silhouette XL w/ 1/4 in Reveal ID Main Beam - 7600
12 ft x 9/16 in Armstrong Suprafine XL Exposed Tee HD Main Beam - 7501
12 ft x 15/16 in Armstrong Prelude XL Exposed Tee HD Main Beam - 7301BL
12 ft x 9/16 in Armstrong Silhouette XL w/ 1/8 in Reveal ID Main Beam - 76008
12 ft x 15/16 in Armstrong Prelude XL Exposed Tee HD Main Beam - 7301AD
12 ft x 15/16 in Armstrong Environmental Prelude Plus XL Exposed Tee Main Beam - AL7200WA
12 ft x 15/16 in Armstrong Prelude XL Fire Guard Exposed Tee ID Main Beam - 8300
12 ft x 15/16 in Armstrong Prelude XL Exposed Tee HD Main Beam - 7301NA
12 ft x 9/16 in Armstrong Suprafine XL Exposed Tee HD Main Beam - 7501BL
12 ft x 15/16 in Armstrong Prelude XL Exposed Tee HD Main Beam - 7301MY
12 ft x 1 1/2 in Armstrong Co-Extruded Clean Room HD Main Beam - EA7903
12 ft x 15/16 in Armstrong G90 Prelude XL for Exterior Applications HD Main Beam -7301G90
12 ft x 15/16 in Armstrong Prelude XL Exposed Tee HD Main Beam - 7301SA
12 ft x 15/16 in Armstrong Prelude XL 360 Painted HD Main Beam - 730136
12 ft x 15/16 in Armstrong Co-Extruded Clean Room ID Main Beam - EA7900
12 ft x 9/16 in Armstrong Suprafine XL Exposed Tee HD Main Beam - 7501ZW
12 ft x 15/16 in Armstrong Prelude Plus XL Stainless Steel ID Exposed Tee Main Beam - SS7200
12 ft x 15/16 in Armstrong Prelude XL HD Main Beam Slotted For Torsion Spring - 7301TS