The Stanard Bag Stabilizer is for rear bags that need stability or added height. It is deigned to be used by setting the rear bag directly on top. The outer edges are sewn and filled with sand to help stabilize the bottom of the bag or level out an uneven surface. Makes your bag rock solid. Be sure to choose style based on if your bag has a standard bottom or a handle bottom. Fits the #13, #13A, #13B, #14, #14A, #14B and Deluxe B.B. Rear Bags. Measures 1/2" Tall. Suede colors may vary. Comes pre-filled with sand due to difficulty of filling. Made in USA 100%.