Resin plate holder that can be installed on the MBC original rack. The short size design saves space and is ideal for storing small plates and barbell collars. Made of resin, the plates slide smoothly and there is no need to worry about the paint on the surface peeling off. Extension Kit (Converts 12CM type to 19.5CM type) Resin short plate holder 7.5cm extension parts x 2 Black bolts for installation M20 x 240mm x 2