Medium Accessory Kit includes: (12) coupling channels, (6) flat elbow pieces, (2) inside elbow piece, (2) outside elbow piece. Ideal for hiding tv cords, computer cords or other unsightly cords and cables. Neatly concealing wires with raceway also helps prevent tripping over wires. Raceway pieces include a self adhesive on the back to affix to the wall (make sure wall is clean and free of dust). Raceway can be cut to fit project needs using a hacksaw or another type of saw. Accessory kit does NOT include screws or anchors--simply extra raceway pieces to add on to a current project or kit.