T-Bar Drop Ceiling Grille - Flat Plate Plaque Difsuer - 24" x 24" - 12" Collar Grilles + Product Details Size –

+ Product Details Size – 28"w X 28"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 28 5/8" width X 24 5/8" height

+ Product Description Upgrade your HVAC system with our 5" Round Air Vent Supply Grille

Designed with two mounting base options—solid and ring—it offers flexible installation

T-Bar Drop Ceiling Grille - Flat Plate Plaque Difsuer - 24" x 24" - 12" Collar Grilles + Product Details Size –Heavy gauge all steel construction. Powder paint coating White One model suits both T Bar and Drywall installations Ideal for VAV systems. Matching OBD dampers, baffles and plaster frames available. These Supply Diffusers with integral round necks are recommended for heating, ventilating and cooling. Round neck to square face construction results in 360 degree air diffusion pattern similar to a full round diffuser. High diffusion induction rates