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For standard 3-1/4 x 10 in duct, 90 deg short way.Unit: EA
For standard 3-1/4 x 10 in duct. Damper spring controlled.Unit: EA
For ducts up to 10 in round and 3-1/4 x 10 in with damper and screen.Unit: EA
1-3/4 in collar. Includes damper and screen.Unit: EA
For ducts up to 7 in round. Includes damper and screen.Unit: EA
3-1/4 x 10 in to round transition.Unit: EA
For round ducts. Damper spring controlled. Removable screen.Unit: EA
For use with 3 in and 4 in installations, round. Includes damper, screen and collars.Unit: EA