4" 3 Hour Vertical Mount Fire Door 2661-60X32 Accessories Standard Features * Full size

Standard Features * Full size fixed bar blade T-Bar lay-in return air grille *

Type 316 stainless steel

Designed for use in walls

Standard Features * Field installable butterfly damper * Available in sizes 6

904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 16" Duct Opening (front blades parallel to shortest dimension)

4" 3 Hour Vertical Mount Fire Door 2661-60X32 Accessories Standard Features * Full sizeh3. Standard Features * 2661 Square or rectangular fire door for vertical mount only. Maximum dimension 60x60. For damper free area chart A click here * 2663 Out of Airstream fire door. Square or rectangular for vertical mount only. Maximum dimension 60w x 52h. For damper free area chart B click here * 2665 Round fire door for vertical mount only. Available 4" thru 52" round. * 3 hour rated * UL and California State Fire Marshall approved * 4 1 4"