Billy Bookshelf Crown Molding Kit | Modular Pack for Any Width Combination of Ikea Billy Shelves | Shelf Aligner | Easy No Glue or Screws**Please note, you will see some slight lines between each of the pieces. Gluing these together can help smooth that out or you can paint these with most off the shelf spray paints. Upgrade your IKEA Billy Bookshelves with our plug and play Crown Molding Kit, designed to add a sleek, modern touch to any Billy bookshelf while keeping your shelves perfectly aligned. This easy to install kit requires no glue or screws, making it simple and hassle free to