Small but mighty. It fits perfectly in a plastic bag, composed of 2 parts that attach by screws system, the long end is inserted into the pocket, there is a notch by pushing to bring out, leaving the plastic of the bag to 2cm from the point where the bushing is placed. For the outside, we put the metal sleeve that you want to use and fixed with the threaded ring. And voila, easy to use, easy to clean, and with the great advantage of being able to change sleeve when we want, and we did not need 2 pockets with the same color to two different designs. Saving of time and material. He had to think. Ibili did