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2" ADC compliant round collar with a bead for ease of installation
904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 4" Duct Opening (front blades parallel to shortest dimension)
T-Bar hinged 2 Cone Step Down Diffuser with Round Collar
Stamped from cold roll steel
Airfoil blades individually adjustable on 3/4" centers
Parallel Blade Volume Damper 3000P-66X48 Specialty Products 2" ADC compliant round collarh3. Standard Features * 16 gauge galvanized channel frame * Parallel blades are cee stiffened 16 gauge galvanized for strength and stability * Blades pivot on non metallic celcon bushings * 1 2" square zinc plated steel pivot pins * 1 2" square zinc plated steel adjustable operating shaft extending up to 4" beyond the air control frame * Single blades on dampers with a height of 12" or less * Mill finish h3. Options * 3000 PLL Low Leak Air Control
