Really Right Stuff's B9 Multi-Use Bi-Directional Plate. This is a multi-purpose, bi-directional plate. I purchased this new at B&H in New York some time ago, and I believe it's not sold in Japan. I used this plate on my camera with an RRS ball head. The size is approximately 3.7cm on each side. I bought it new at the time for $50 plus shipping. I checked and it seems the price has gone up to $60 now. It has been used, so there are scratches, scuffs, and mounting marks. However, it's a sturdy item, used by professionals, so I think it can still be used for a long time. Thank you very much.