Office Furniture Design Simple Assembly Poster Frame by Huajie Sun Simple Assembly is a modular display rack for posters. The system uses four sizes of aluminium alloy frame rods and three accessories. Each rod has a concave and convex joint, with a magnet at one end and metal at the other, so rods connect in straight or L-shaped forms. Rubber connectors join up to three rods, and clamps hold the poster in place. A U-shaped lock fixes the rack to a lamp post. One set can be built for small posters or for medium exhibition walls, so fewer frames are left unused.