10" X 18" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 12 5/8" X 20 5/8"] Fixed Blades with Damper Actual Filter Size – 13 Suitable for all AC 8in diameter 12125SDCLNGBX

Actual Filter Size – 13 3/4"w x 17 3/4" x 1"

2" X 10" Brass Victorian Floor Register Grille - Modern Contempo Decorative Grate - HVAC Vent Duct Cover - Brass Plated

Actual Filter Size – 11 3/4"w x 13 3/4" x 1"

+ Product Details Size – 6"w X 14"h is the size for the duct opening measurement only

10" X 18" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 12 5 8" X 20 5 8"] Fixed Blades with Damper Actual Filter Size – 13 Suitable for all AC 8in diameter 12125SDCLNGBX Actual Filter Size – 13 3 4"w x 17 3 4" x 1" 2" X 10" Brass Victorian Floor Register Grille Modern Contempo Decorative Grate HVAC Vent Duct Cover Brass Plated