Ply Gem patented 5/4" one-piece outside corners are folded, so there is no rough corner seam and no unsightly joint to collect dirt. It is available in 12' or 20' lengths and with or without a J-notch, to receive vinyl siding without the need for unattractive J-channel when used with vinyl siding. Our exclusive Dense Core technology features micro-ingredients and tight process controls that create a dense, fine cell structure, consistent from corner to corner. The unique woodgrain texture coordinates with the look of many siding types. It is available in paintable smooth or woodgrain textures for options that best fit your home.