Designed for 4 way air diffusion and reduce smudging
Use 06 in venti damper to control air flow (buy separately)
06 in. neck is 2-1/2 in high making installation easier & faster
3 cone air diffuser is for T-Bar, Drop Down, Lay in ceilings. 2-1/2 in. high grooved collar makes installation easier and faster. Optional damper sits in the groove.