AmeriFlow 400B8X10 Heavy Duty Brown Steel 8″ Inch x 10″ Inch Floor Register Vent
Fits 8″ x 10″ ducts. Overall (top) size is 11-3/4″ x 9-3/4″. -Individually Assembled Strong Steel Bars. -Listed Size of 8″ x 10″ is “Duct Size” ( this fits a 8″ x 10″ duct).