Aluminum extension pier for SkyHunter mount. It has 3/8-16 threaded mounting holes on both top and bottom flanges. It can be added onto iOptron #3221 tripod, as well as any tripod has a 3/8 mounting screws, or 1/4 via a thread converter.

Height: 190mm (7.5")
Flange Diameter: 82mm (~3.2")
Tube Diameter: 58mm (~2.3")
Mounting hole: 3/8-16 or 2X M6