Features: Protect your 2020 aluminum extrusion profiles with these EU standard V Slot end caps, featuring 4.2mm mounting holes and wear resistant ABS construction for 3D printers and machines. Precisions engineered 20x20mm black caps extrusion ends from dusts/water while covering sharply edges, for slot width and rusts proof ABS material. for makers, engineers, and enthusiasts building 3D printers, lasers engravers, or equipment requiring professional profile finishing. Maintain clean extrusion port in workshops or maker space by capping exposed aluminum profiles vulnerable to debris during printing, cutting, or engraving operations. Quick installs allows manual press fitting followed by light hammers tapping for secure placement, specifically for V Slot systems (not T Slot compatible). Specifications: Materials: ABS Size: Side length 20mm Package Includes: 10Pcs 2020 Aluminum Profile End caps note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.