Sputtering Disk Mount 7/8" Mounting Diameter, 3/8" View Diameter, Water-Cooled

Sputtering Disk Mount 7/8" Mounting Diameter,  3/8" View Diameter, Water-Cooled UHV High Vacuum

Used in good condition. The Mounting Diameter for disks is 7/8" and the Viewing Diameter on the otherwise is 3/8". See photos.

The top portion comes off of the base mount as shown in photos.