NIKON FM Series, FE Series, and FA Series Eyepiece Condition: The rubber parts are relatively clean as shown in the photos. Upon close inspection of the glass surface, there are some slight coating blemishes in the center, which are difficult to see in the photos, but I don't think they affect the view. The screw thread diameter is approximately 19mm, as measured with a ruler. This is a discontinued product, making it a rare item. The condition is fairly good, so how about taking this opportunity? Shipping is free, and will be sent via Yu-Packet Plus Mini using Yu-Yu Mercari. Please understand that recycled materials will be used for packaging. Please check the condition and size carefully in the photos before purchasing.