4 1/4" Horizontal/Vertical Mount Fire Damper 2602-36X36

h3.Standard Features * 2601 - Square or rectangular for vertical mount only. Maximum dimension 60x60 single, 120x120 multiple. * 2602 - Square or rectangular spring actuated (6) for horizontal or vertical mount. Maximum dimension 60x60. * UL and California State Fire Marshall approved * 4-1/4" standard frame style * Interlocking steel roll-formed blade (3) with roll-formed frames (1) * Blade lock (5) * Damper manufactured from corrosion tested galvanized mild steel (G-90) * Self locking corner (4) * 165° replaceable fusible link (2) h3.Options * 2800 Series - Dynamic Fire Damper * Sleeve variations * 304 stainless steel construction * Fractional and odd sizes available h3.Installation Instructions * UL approved installation instructions