If you ever wanted to make your own record cleaner these parts are a awesome foundation . This platter and spindle where made on a very expensive CNC machine. 1/1000 tolerances. If you are DIYer this is great start to a Vinyl Record cleaning (vacuum) machine project. The platter is made of solid 1/8 Aluminum strong enough for any cleaning pressure and is 12" across. I made it 1/8 larger then a vinyl record all around.Comes with counter sunk screws and set screw for 6mm motor shaft. 37mm gear motors work great. You can make the shaft hole larger if you want. You will have to have a mill or drill press. The spindle collar is wide enough to accommodate a larger hole. 5 pieces total . Platter,spindle and 3 screws. Screws are #6-32. Save hundreds and make a vinyl record cleaner yourself . I did. Thank you.