Starting Collar with Self Adhesive Air Tight Gasket, Adjustable Damper and Scoop which is used to help direct more air flow into the fitting.
Item Codes:
ATSD06 #ATSD6 ATSD 6″ Collar with Scoop and Damper
ATSD08 #ATSD8 ATSD 8″ Collar with Scoop and Damper
ATSD10 #ATSD10 ATSD 10″ Collar with Scoop and Damper
ATSD12 #ATSD12 ATSD 12″ Collar with Scoop and Damper
ATSD14 #ATSD14 ATSD 14″ Collar with Scoop and Damper
ATSD16 #ATSD16 ATSD 16″ Collar with Scoop and Damper
ATSD18 #ATSD18 ATSD 18″ Collar with Scoop and Damper
