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Ships within 48 hours · Estimated delivery Aug 20 - Aug 25
3/4" round collar
Designed to handle high volumes of air with horizontal flow
Double deflection radius mount spiral pipe grille with adjustable blades
Nylon bushings on adjustable blades to prevent metal on metal rattle
4 1/4" Vertical Mount Fire Damper 2633-30X10 T-Bar 3/4" round collarh3. Standard Features * 2633 Square or rectangular out of airstream fire damper for vertical mount only. * 2634 Square or rectangular Spring actuated (6) out of airstream fire damper for horizontal or vertical mount. * UL and California State Fire Marshall approved * 4 1 4" standard frame style * Maximum dimension 60w, 52h * Interlocking steel roll formed blade (3) with roll formed frames (1) * Blade lock (5) * Damper manufactured from corrosion
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