T-Bar Drop Ceiling Grille - Flat Plate Plaque Difsuer - 24" x 24" - 12" Collar Return you have 16 different varieties

you have 16 different varieties to choose from

+ Product Details Size – 10"w X 8"h is the size for the duct opening measurement only

5" width x 13

10" x 4" Floor Register HVAC Air Supply Grille - Heavy Duty Rigid Built - Plastic Never Rust Vent Duct Cover

The total outer size of this grille is the listed size plus 2 and 5/85"

T-Bar Drop Ceiling Grille - Flat Plate Plaque Difsuer - 24" x 24" - 12" Collar Return you have 16 different varietiesHeavy 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