3/4" INSIDE CORNER POST COLONIAL WHITE 10' | The CertainTeed 3/4in. Vinyl 10' Inside Corner Post is anything but the standard traditional narrow corner trim with no dimensions. CertainTeed Vinyl Corners have a woodgrain finish. These corners will accommodate CertainTeed's CertaPlank, Monogram, Restoration Classic, Board and Batten, Carolina Bead, Mainstreet, Wolverine American Legend, and Encore vinyl sidings only. With matching inside and outside mitered corners, you can create an elegant outline of your home with distinction when siding your home.