Photo 1 of 12" X 4" Baseboard Return Air Grille - HVAC Vent Duct Cover - 7/8" Margin Turnback for Flush Fit with Baseboard Work - White [Outer Dimensions: 13.75" Width X 5.75" Height] 12 x 4

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Photo 1 of 12" X 4" Baseboard Return Air Grille - HVAC Vent Duct Cover - 7/8" Margin Turnback for Flush Fit with Baseboard Work - White [Outer Dimensions: 13.75" Width X 5.75" Height] 12 x 4Photo 2 of 12" X 4" Baseboard Return Air Grille - HVAC Vent Duct Cover - 7/8" Margin Turnback for Flush Fit with Baseboard Work - White [Outer Dimensions: 13.75" Width X 5.75" Height] 12 x 4Photo 3 of 12" X 4" Baseboard Return Air Grille - HVAC Vent Duct Cover - 7/8" Margin Turnback for Flush Fit with Baseboard Work - White [Outer Dimensions: 13.75" Width X 5.75" Height] 12 x 4Photo 4 of 12" X 4" Baseboard Return Air Grille - HVAC Vent Duct Cover - 7/8" Margin Turnback for Flush Fit with Baseboard Work - White [Outer Dimensions: 13.75" Width X 5.75" Height] 12 x 4