ITEM NAME:2020 Corner Bracket for 20mm Extrusion Size 20x20x17mm Pack of 25 B9T1 2020 Corner Bracket for 20mm Extrusion Size 20x20x17mm Pack of 25 B9T1 Dimensions: 20mm x 20mm x 17mm Material: Solid Cast Aluminum Rigid connection, used to connect pieces of 20mm aluminum extrusion at a 90 degree angle Suitable for most of metric 20 Series Aluminum Extrusion Type: 2020 aluminium connecting fastener Widely used for building 3D printers, 3D carvers, CNC routers, CNC cutters, CNC plasma cutters, robotics projects, machine guards, workstations, etc. Color: Silver Package List: 25 x 2020 Corner Brackets Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.