T-Bar Drop Ceiling Grille - Flat Plate Plaque Diffuser - 24" x 24" - 6" Collar Width_20in actual front end outer dimensions

actual front end outer dimensions are approximately 18 5/8" width X 8 5/8" height -

Ideal for both residential and commercial environments

crafted from heavy gauge steel for unparalleled durability

Designed with a ring base for flexible installation

you can watch this informative video tutorial: How to Measure Your Vent Hole Before Ordering a Grille

T-Bar Drop Ceiling Grille - Flat Plate Plaque Diffuser - 24" x 24" - 6" Collar Width_20in actual front end outer dimensions+ Product Details Size 24"w X 24"h. These are specially sized to fit into all drop ceilings, also called T Bar systems. Can be hooked up with our "Butterfly Dampers" for precise airflow control. For 6" duct opening High Quality Heavy gauge all steel construction. Installation Location Ceiling. Design These Supply Diffusers with integral round necks are recommended for heating, ventilating and cooling. Round neck to square face construction results in