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![14"W x 6"H [Duct Opening] Steel Triangular Baseboard Return Air Grille | Air Register Vent Cover Grill | 3.75" Depth | White | Outer Dimensions: 15-3/4" x 6-5/8"](http://airgrilles.com/cdn/shop/products/3_72a9314b-0c77-4e5e-97bd-09dbceb1dac7.jpg?height=200&v=1751353338)
![12"W x 6"H [Duct Opening] Steel Triangular Baseboard Return Air Grille | Air Register Vent Cover Grill | 3.75" Depth | White | Outer Dimensions: 13-3/4" x 6-5/8"](http://airgrilles.com/cdn/shop/products/3_f090f989-e042-47b0-ab2f-e5a5164391cc.jpg?height=200&v=1751353340)
![24"W x 6"H [Duct Opening] Steel Triangular Baseboard Return Air Grille | Air Register Vent Cover Grill | 3.75" Depth | White | Outer Dimensions: 25-3/4" x 6-5/8"](http://airgrilles.com/cdn/shop/products/3_fd953ae8-6f1c-41e9-80bb-f2e4df6fd200.jpg?height=200&v=1751353337)
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