We wanted to find a solution to the often upcoming question where to put your cardboard rolls.Our answer: K620. In the inside of the rhombus you can store all your rolls. If you remove one, the others will immediately fill the space, so you do not have to sort them back in, which is annoying and takes valuable time. On both upper sides enough space can be found to lay out important documents and sketches. With the k310 you are able to extend the tube to your choice. And also taken for itself it provides maximal practicability.