Rectorseal 84105 Fortress Lineset Covers 4.5"12'Wall Duct Kit White 122Rectorseal 84105 Fortress Lineset Covers provide a durable and cosmetically appealing solution to protect components on the building exterior. Moderately priced, Fortress is compatible with a variety of A C systems, conceals and protects linesets, wiring and drain hoses from weather and damage. Features 4. 5" Fortress Kit includes fittings to cover up to a 12 ft lineset run with a 4. 5" duct. PVC, UV stabilized fire resistant. Tested to over 2,000