This is an adapter ring for snap-on hoods for Canon EF lenses. It is the thin type (8mm thick) that came with the ET-62 or EW-62, not the ES-62 hood (62-L, 12mm thick) that came with the EF50mmF1.8 II. The item for sale is only the adapter ring in the first photo. The second and subsequent photos are reference photos explaining the mounting condition. Please note that the ES-62 and 62-L are not included in the sale. This is a used item. Please judge the condition from the photos.