12" x 32" or 32" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 3-Way or 4-Way this 4-way air vent diffuser Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

this 4-way air vent diffuser allows you to precisely control airflow

angle them down for effective warmth distribution

+ Product Details Perfect Fit & Easy Sizing - Designed for a 28" x 24" OR 24" x 28" duct opening (measured at the opening)

Actual Filter Size – 17 3/4"w x 15 3/4" x 1"

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12" x 32" or 32" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 3 Way or 4 Way this 4 way air vent diffuser Compatible With Duct 7in Applications This sheet metal DDAG A 1212 this 4 way air vent diffuser allows you to precisely control airflow angle them down for effective warmth distribution