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1-1/2" x 1-1/2" x 10' retaining angle for fire damper, prepunched with 7/32" holes for faster fastening of angle to sleeve. Hole spacing is 3" on center. The fire damper angle secures the sleeve (fire dampers are mounted in 12" to 18" metal sleeves and put in wall openings between rooms) in position so ductwork can be connected. Fire damper angle is screwed to the damper sleeve on both sides of the wall and on all 4 sides of the sleeve. Ductwork is connected to the sleeve with break away connections. (20 ft. lengths available but not in stock at all of our locations. 14 ga. is also available - please inquire.)
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