It enables the Cosmopolitan to be easily recessed into a drop ceiling. Mounted to the end caps with the included mounting hardware, It provides a uniform slot in the ceiling for the screen to drop from. It is available for use with both tensioned and non-tensioned versions of the Cosmopolitan in sizes up to 9" x 12". Main FeaturesManufacturer: Da-Lite Screen CompanyManufacturer Part Number: 96382Manufacturer Website Address: www.da-lite.comProduct Type: Ceiling-mountable