10" x 34" or 34" x 10" Cube Core Eggcrate Return Air Grille w8h8 + Product Details Perfect Fit Compatible with Duct 4" Product Details Size 32 LO246

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 28" OR 28" X 14" duct opening (measured at the opening)

+ Product Details Size - 18"w X 36"h is the size for the duct opening measurement only

Design – Fixed Hinged for easy filter change & cleaning - uses a 1" thick filter

+ Product Details Size – 12" X 2" is the size for the duct opening (floor/vent hole) measurement only

+ Product Details Size – 18" Corner Baseboard Grille - White - HVAC corner vent cover

10" x 34" or 34" x 10" Cube Core Eggcrate Return Air Grille w8h8 + Product Details Perfect Fit Compatible with Duct 4" Product Details Size 32 LO246 + Product Details Perfect Fit & Easy Sizing Designed for a 14" x 28" OR 28" X 14" duct opening (measured at the opening) + Product Details Size 18"w X 36"h is the size for the duct opening measurement only