Cosmopolitan Corner Cornice Kit -State of the art, light weight, do-it-yourself window cornices. 9 Inch drop, 12 Inch drop or 15 Inch drop. 16" EXTENSION KIT INCLUDES:The kit includes 2 - 16" extension piece to extend the window width and mounting hardware.Bracket options: 3" brackets are used for recessed blinds allowing 3" of clearance off of the wall. 5" bracket allows for 5" of clearance off of the wall for outside mounted blinds and draperies. Assemble the kit with a low temperature glue gun, which we sell in the glue guns/glue sticks section of this web site.These cornices are constructed in 3 easy steps. Please order carefully - Cornice kits and their components are non-returnable.