Rectorseal 85476 Slimduct 3.75" Wall Inlet Brown 100Rectorseal 85476 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 The Wall Inlet is used where the lineset enters the exterior sidewall of the building (additional inlet types are