Collars Provide Accurate Transition And Efficient Air Flow.
Collars are made of standard gauge galvanized steel for long lasting durability. Helps transition from plenums to pipes or ducts to maintain efficient airflow. Size, gauge and package quantities vary. Types: Center Transition Collar, Duct Start Collar, Filter Box, Snap Collar, Start Collar, Trim Collar and Twist-In-Collar
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