16" x 26" or 26" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w30h30 4" X 12" Is The SV2414 HP Product Details Perfect Fit 12" Round Duct Pipe

4" X 12" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

This grill comes in four different designs

+ Product Details Perfect Fit & Easy Sizing - Designed for a 22" x 14" OR 14" x 22" duct opening (measured at the opening)

12" x 8" Decorative Wood Air Vent HVAC Duct Cover Grille - Polished Finish Red Oak Wood - 2-Way Air Direction

Actual Filter Size – 33 3/4"w x 5 3/4" x 1"

16" x 26" or 26" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w30h30 4" X 12" Is The SV2414 HP Product Details Perfect Fit 12" Round Duct Pipe 4" X 12" Is The Size For The Duct Opening (floor vent hole) Measurement Only This grill comes in four different designs