Slimduct professional grade construction offers strength and longevity everyone can appreciate. Available in 3 sizes, Slimduct will accommodate single and multiple exposed linesets with 3 color choices and can compliment neutral or painted facades. A complete line of fittings assures each installation can be finished both quickly and professionally. Slimduct® End Fitting, 3-3/4 in W, For Use with: Slimduct® Lineset Ducting System, Architectural Grade Polymer, Gloss, Brown, Import