Don't crush that dryer transition duct! Use Builder's Best Close Elbow combined with the SilverDuct(TM) Dryer Transition Duct to complete your BetterVent Indoor Dryer Vent installation. Made of heavy gauge aluminum it provides a 90 degree turn in just 4.5" allowing unit to be located closer to wall. Collars adjust to best fit your needs, includes one clamp. Made in USA.