StructureLite Blox Hub
The StructureLite Blox Hub Connector for Square Profile is a 2″ square x 1.25″ deep hub connector with 45 degree beveled corners. It uses four capstans and set screws to extend square profile in four directions. Additionally, a 1.25″ square profile may be passed through the center. This hub connector may also be used to transition from square profile to round profile.
Use with this connecting hardware HD-CP55 (found here) , HD-VGBC (found here), HD-DVGBC (found here), HD-NT7 (found here)