T-Bar Drop Ceiling Grille - Flat Plate Plaque Diffuser - 24" x 24" - 6" Collar 8" Diameter Complies with industry standards of

Complies with industry standards of USA: ASTM D-882

Install 2 Vents

High quality – High quality solid stamped steel with counter-sunk screw holes (screws included) and no sharp edges

+ Product Details Size – 8" round duct opening

actual front end outer dimensions are 11

T-Bar Drop Ceiling Grille - Flat Plate Plaque Diffuser - 24" x 24" - 6" Collar 8" Diameter Complies with industry standards of+ 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