Specially Designed Airflow Regulators Limit High Cfm Range Hoods To A Maximum Of Less Than 300 Cfm, Complying With Most Local Codes For Hood Installations Without The Need For Make-Up Air. As A Result, These Kits Give Access To A Broader Offering Of Styles And Designs Within The Best Line Of Range Hoods Without The Need For Costly Add-On Systems In The Home. (Ul)(Li) 6" Round (/Li)(Li) The Individually Packaged Arp Cfm Reducer Kits Come With: (Ul)(Li) A Reducer Plate(/Li)(Li) Screws(/Li)(Li) Installation Instructions(/Li)(/Ul)(/Li)(Li) Everything You Need To Make Installation Effortless! (/Li)(Li) Best Hood Models Tested For Use With Respective Cfm Reducer Kits. (Ul)(Li) Is170 Series(/Li)(Li) Is23 Series(/Li)(Li) Is241 & Ber02Is Series(/Li)(Li) Is502 Series(/Li)(Li) K15 Series(/Li)(Li) K273 Series(/Li)(Li) K29 Series(/Li)(Li) K30 Series(/Li)(Li) K3139 Series(/Li)(Li) K34 Series(/Li)(Li) K3500 Series(/Li)(Li) K41 Series(/Li)(Li) K7388 Series(/Li)(Li) K7788 Series(/Li)(Li) K8087 Series(/Li)(Li) P195Im Series(/Li)(Li) Wc23I Series(/Li)(Li) Wc26I Series(/Li)(/Ul)(/Li)(/Ul)