This is a filament holder. I designed it to have the least amount of parts. The printed parts are printed on a Felix 1.0 3d printer from www.felixprinters.com The goal was to mount it vertically on the aluminum frame of the printer, but the filament was intertwined so when rolling of it got stuck. For these kind of filament rolls, it is good to put it on a flat surface (floor, table). It is reliable and hasn't failed me yet after printing for lots of hours.Ingredients: 2 bearings (inner diameter: 8mm outer diameter: 22mm) 3x 250 mm M8 rods 1x 50 mm M8 rod or bolt 14x m8 bolts 3x printed partsNote: It is recommended to let some space between the filament and the placeholder parts