Fire Damper, Fire Damper, Square, Mounting Type Dynamic, Vertical or Horizontal, 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 MEA. This item has been restricted from sale in the following state(s): []