I made this ca 78x48x31 mm mount for a Faraday Isolator (Model IO-7-633 Optics For Research, now sold by Thorlabs) from 50x50 Aluminium bar on the manual mill at work. It raises the isolator up from the table by 31 mm. The isolator is attached to the mount with two M6 screws, 28 mm apart. The cap-head screws are countersunk so they don't protrude from the bottom. This mount is clamped to the optical table using the 8x5 mm slots in the sides.