Query: 8x8 return air grille
8"w X 16"h Steel Return Air Grilles - Sidewall and Ceiling - HVAC Duct Cover - White [Outer Dimensions: 9.75"w X 17.75"h]
8" X 8" Steel Return Air Grille | HVAC Vent Cover Grill for Sidewall and Ceiling, White | Outer Dimensions: 9.75"W X 9.75"H for 8x8 Duct Opening
14"w X 8"h Steel Return Air Grilles - Sidewall and Ceiling - HVAC Duct Cover - White [Outer Dimensions: 15.75"w X 9.75"h]
8" X 8"Aluminum Return Grille - Easy Air Flow - Linear Bar Grilles [Outer Dimensions: 10.5"w X 10.5"h]
TruAire 8 in. x 30 in. Heavy Duty Floor Return Air Grille
TruAire 8 in. x 12 in. Heavy Duty Floor Return Air Grille