Rectangular multi-blade damper, several sizes available.
Volume Control Damper (Opposed Blade) - Screw Type | Volume Control Damper (Opposed Blade) - Screw Type | By Almadeco - Alfaj Marketing & Development Corporation | Facebook
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MANUFACTURED RANGE Opposed Blade Dampers - Quality Air Equipment Quality Air Equipment
Opposed blade damper with handle for rectangular ducts - Opposed blade damper with handle for rectangular ducts