These brackets are for the IKEA Brimnes cabinet (803.006.60) to store filament in a discrete and unintrusive way. The cabinet can be purchased from IKEA and the wooden dowels can be purchased at any Hobby Lobby or similar crafts store.
Parts Required:
Simply build the cabinet without installing the shelves, then place the metal mounting pieces through the brackets before inserting into the cabinet walls. after installing the brackets, insert the wooden dowels from the top and cap off the metal pieces with the printed caps. If you are unsatisfied with the fit of the dowels, use the printed shims to make sure they fit more snugly.
Total cost of everything including cabinet, dowels, and filament is estimated at $114 plus tax.