4 1/4" Vertical Mount Fire Damper 2601-12X12 past 12 months 2-way reversible door on rectangular

2-way reversible door on rectangular sizes

Square collar designed for 20” × 20” duct

Stainless steel

NGD - Narrow ceiling grid dimples for 9/16" T-Rails

4 1/4" Vertical Mount Fire Damper 2601-12X12 past 12 months 2-way reversible door on rectangularh3. 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