Rectorseal 85088 Slimduct 2.75" Twist Ell, Black 77Rectorseal 85088 Slimduct Lineset Covers offers strength and longevity with a professional aesthetic. Available in 3 sizes and colors, Slimduct Lineset Covers accommodates numerous applications including single or multiple exposed linesets. A robust assortment of fittings ensures each system is finished with a professional touch. Features Twist Elbows change the direction and the orientation of the lineset when transitioning to a 2nd wall or surface.