The Nozzle Adapter Kit 4 in x 6 in (#700467) has a three-piece metal frame that converts airflow from louvers to nozzles. The kit includes mounting screws. (Nozzles sold separately.) The Duct Adapter Kit (#700468) is the same as the Nozzle Adapter Kit, but for use with cold air flexible ducts. This kit includes a flange. (Cold air flexible ducts sold separately.) Drop ship only.