Hart & Cooley Ceiling Diffuser

Fits a 6 round hole in ceiling overall outside diameter is 9-15/16 Step-down diffuser rings deflect air stream 360 degrees Bright White finish All-steel construction 6 Butterfly Damper for this Diffuser (# 013220) Sold Separately Three mounting holes to securely fasten to the ceiling screws included Color : White The Hart & Cooley 16 Series 6 round ceiling diffuser is designed to fit a 6 hole in the ceiling. The overall outside dimensions of the diffuser is 9-15/16 Diameter x 11/16D. Please measure before buying.