Features: It is used for the right-angle connection of two profiles. During installation, both ends of the profiles are inserted into the slots of the profiles, and the set screws are locked. Please choose different corner connectors according to the slot width and connection mode of the profiles. Material: Made of high quality zinc alloy material, the surfaces is nickel plated for good rust resistances and better performances, durable and solid. Used for: Suitable for european standard 2020,3030,4040 series aluminum profiles, built-in connection with beautiful and simple features. Application: 2020,3030,4040 Series Aluminum Profile Connector widely used for building industrial aluminum frame structures, etc. Advantage:Concealed corner brace, the L corner bracket can be completely hiddens in the slot of the aluminum extrusions. Specifications: Material: Zinc Alloy Type: 1/2/4 1: Approx. 25x26mm/0.98x1.02inch 2: Approx.31x37mm/ 1.22x1.45inch 4: Approx.31x37.5mm/1.22x1.47inch Package Includes: 10 Pieces/set Corner Connectors note: Please allow 1-2cm errors due to manual measurement,Please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.