24x24 Steel T-Bar Drop Ceiling Diffuser with Round by Kumpelaure 3 Cone Drop Celing Vent White Outer Dimension: 23-3/4" x 23-3/4" Neck Size:8 inch Measure the size of the

Measure the size of the air duct opening(the size of the “hole” )

actual outside dimension is 17

actual outsize overall dimensions is 11

and long-term durability

Easy adjust air flow control with central lever

24x24 Steel T-Bar Drop Ceiling Diffuser with Round by Kumpelaure 3 Cone Drop Celing Vent White Outer Dimension: 23-3/4" x 23-3/4" Neck Size:8 inch Measure the size of theUpgrade your HVAC system with this high performance 3 cone ceiling air diffuser, designed for consistent airflow, easy installation, and long term durability. Ideal for drop ceiling applications, it delivers both functionality and a clean, professional finish. Innovative 3 Cone Design: Engineered for T bar, drop down, and lay in ceilings, featuring a 2 1 2" grooved collar for faster, more secure installation; compatible with optional dampers for