10pcs 2020 Corner Bracket Aluminum Size 20x20x17mm for T Slot Aluminum Extrusion CNC 3D Printer Go to amazon.com Related posts How to buy the best t-slotted extrusion brackets? Where to find t-slotted extrusion 20mm? FeatureDimensions: 20mm x 20mm x 17mm, 5.8mm x 8.8mm slotsMaterial: aluminumCompatible extrusion profile: 2020, 20mm x 20mm, 20 series DescriptionConnects 20 Series T-slot aluminum extrusions together for a 90 degree connection.