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Blades parallel to shortest dimension
Powder coat finish
032 Aluminum construction * Tamper proof screws * Standard Color
Type 316 stainless steel
3-hour fire resistance rating
Parallel Blade Volume Damper 3000P-40X20 Step Down Ceiling Diffuser Blades parallel to shortest dimensionh3. 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
