4000 Series is our Frameless Flat Panel line. Frameless cabinets, however, do not have this extra frame in the door front. They offer a sleeker, modern look that’s popular in Europe. This box construction provides full access to the cabinet interior and larger drawer box capacity. Without the frame, frameless cabinets rely on a thicker box for strength and stability. Flat panel doors are popular for modern and contemporary designs. Unlike Shaker doors, flat panel doors have a simple and sleek appearance. They are characterized by their flat, smooth surfaces with no ornate detailing or embellishments. This minimalist aesthetic creates a clean, streamlined look often associated with modern design styles.