Fortress™ Lineset covers are a precision system of premade ducting offering strength and longevity at a modest price point. Perfect for a variety of A/C systems, Fortress™ conceals/protects lineset, wiring and drain hose from weather/damage. Made in USA. Fortress™ Flexible Elbow, 3-1/2 in L, For Use with: Fortress® Lineset Ducting System, PVC, Gray, Import