Query: 10 x 10 register
HBW 10"x 10" (Duct Opening Size) 4-Way Stamped Face Steel Ceiling/sidewall Air Supply Register - Vent Cover - Actual Outside Dimension 11.75" X 11.75"
HBW Four-Way Plastic Side Wall/Ceiling Register in White 10" w X 10" h for Duct Opening (Outside Dimension is 12" w X 12" h)
Accord ABSWWH41010 Sidewall/Ceiling Register with 4-Way Design, 10-Inch x 10-Inch(Duct Opening Measurements), White