"Lambro" Aluminum Dryer Vent Ducts Permits dryer installation 3" from the wall. 2" x 6" Rectangular aluminum duct Ideal for installations where the dryer is installed in a closet area. Tite Fit-90 Degree Solves Tight Space Venting Problems. Rectangular Aluminum Dryer Venting Duct It Extends from 18" to 30"