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Fire Damper with Sleeve, Sleeved Fire Damper, Square, Mounting Type Dynamic, Vertical, Nominal Duct Width 10 In., Nominal Duct Height 10 In., Damper Depth 3-11/16 In., Material 22 ga. Galvanized Steel, Damper Height 9-3/4 In., Damper Width 9-3/4 In., Recommended Retaining Angle 2TGG7, Fire Rated 1-1/2 hr., Free Area 0.422 sq. ft., Fusible Link 165 Degrees F, For Use With Low Pressure HVAC Systems, Standards UL Standard 555, NFPA 80, 90A and 101, IBC, CSFM, NYC MEASpecification: Standards: UL Standard 555, NFPA 80, 90A and 101, IBC, CSFM, NYC MEAIncludes: Stainless Steel Closure Spring, UL Fusible LinkMaterial: 22 ga. Galvanized SteelNominal Duct Width: 10"Item: Fire Damper with SleeveDamper Shape: SquareRecommended Retaining Angle: 2TGG7Fusible Link: 165 Degrees FFor Use With: Low Pressure HVAC SystemsFree Area: 0.422 sq. ft.Nominal Duct Height: 10"Damper Width: 9-3/4"Mounting Type: Dynamic, VerticalFire Rated: 1-1/2 hr.Damper Item: Sleeved Fire DamperDamper Depth: 3-11/16"Damper Height: 9-3/4"