Here is an Aluminum disc. It’s 200mm or app 7-7/8″ diameter and point 260 thick. This is 2 sections. The smaller disc is attached to bottom disc via three 10-32 screws. The smaller disc is app 2″ diameter and 1″ tall. Was used as some sort of centering fixture so the top acted as a handle. There is a dowel pin extending from both sides of bottom. And there is a small hole in smaller disc for dowel pin. Dowel pin on bottom can be milled off if needed. Weighs app 1-1/2 pounds. This is used. Some dings, scratches and blemishes from previous use. This was custom made so no mfg info or packaging. Free shipping via USPS Parcel select of UPS / Fedex Ground, depending on zip. If you have any questions, please let me know. Thanks.