Feature: Beautiful and fashionable: The aluminum profile extruded linear motion guide is made of aluminum alloy material. The surface is anodized, good strength, beautiful and fashionable. Nice for 3D printer and CNC build: 2020 European standard aluminum profile is made of standard T slot, good for 3D printer and CNC build, compatible with various standard parts like M4, M5 T slot nuts. Specification: Length: 1000 mm Size: 20 x 20 x 1000 mm Type: 2020 aluminum profile extrusion Material: aluminum alloy Color: silver Standard: European standard Surface: electrophoresis anode Package includes: 10 Pieces 1000 mm 2020 aluminum profile extrusion Warm notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.