T-Bar Drop Ceiling Grille - Flat Plate Plaque Diffuser - 24" x 24" - 6" Collar 8" Diameter The integral design allows you

The integral design allows you to easily adjust the curved blades

actual front end outer dimensions are approximately 34 5/8" width X 20 5/8" height

actual front end outer dimensions are 11

Complies with industry standards of USA: ASTM D-882

T-Bar Drop Ceiling Grille - Flat Plate Plaque Diffuser - 24" x 24" - 6" Collar 8" Diameter The integral design allows you+ 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