Review on 🔨 KOOTANS 2Pcs/Lot 90 Degree Joint Board Plate Corner Angle Bracket Connection Joint Strip - Ideal for 8mm Slot 3030 Aluminum Profile 3D Printer Frame by Dean Love

These brackets are precision machined with no burrs or tool marks such as indentations or flared holes. Perfectly smooth. Material - heavy aluminum plate. The finish is satin and I assumed transparent iridite passivated or anodized. I used them as is but the surface can be painted if you wish. The price is great, especially considering you get the hardware (with proper t-nuts) to install with five bolts in 2020 profiles. My cube printer is extremely stable with these extra parts. Highly recommended.