SummaryNice fitting strong spool arm to go on CTC and Flashforge style Replicator clones, with the round holes in the back. Some of the clones are now shipping without any kind of spool arms for the back. Most of the printable ones are junk. Too weak, or bulky or just bad fits. This arm will fit closely to the printer, seal the hole completely, and support the heavy filament spools without issue. Parametric model, so you can make it whatever length you want. We designed this as a simple closed (as in no hole through the center) spool arm to minimize the opening in our Replicator style printers, when we enclosed them with our acrylic enclosures. Details on the enclosures and printer arms can be seen at: http://drazzticaction.com/products-page-2/3dprinters/ EnjoyPrint SettingsPrinter: Flashforge creator XRafts: NoSupports: NoResolution: 0.27 or standardInfill: noneNotes: Prints horizontal with no raft or support. Has internal structure for strength. Prints with zero fill, 2 shells. Post-PrintingInstallationInserts at an angle an rotates down to lock into position. Two small protrusions to the bottom. Sleek, simple and effective. Enjoy.How I Designed ThisDesigned in OpenSCAD to be parametric and easily customized.You can change the length diameter, and the thickness of the mating printer wall.