Black Angle Corner Connector for 20mm Aluminum Extrusion (2 Pack) Dimensions: 20mm*20mm*20mm; Material: Machined Aluminum Compatible with all 20mm-based aluminum extrusion, including Misumi 5 Series, 80/20 20 series, Openbuilds V-Slot(TM), and Openbuilds C-Beam(TM) Create connections between aluminum profiles in almost any configuration 7.2mm holes accept eccentric spacers for adding adjustable v wheels for linear motions systems Package Contents: 2 Connectors