A simple but very convenient and space efficient way to store spools can be mounted under desk or under shelf. easy slide in spool design that is expandable. print file is of 2 mounts (enough for 1 spool) add 1 additional mount for every additional spool. no support needed, just print them standing up. works best with suction dry bags as pictured to store your spools without moister. hope these help some of you! and print on friends!