[Type]: This is a SCS20UU linear motion ball bearings, fits for 20mm round shaft. [Application]: Fits for 3D printer and CNC machine or in variety of other linear applications. [Precision Manufacturing]: The high-density aluminum alloy structure makes the slider a strong load-bearing capacity, and surface oxidation treatment, durable and corrosion-resistant. [High Performance]: Smooth movement, low friction, high rigidity, easy to maintain and replace. [Replacement]: Ideal for you to replace the damaged bearings in your equipment to improve efficiency and save energy. [Package]: 4Pcs SCS20UU linear motion ball bearings, the length of each one is about 50mm. Type Linear Rail Guide Slide Model SCS20UU Inner Diameter 20mm/0.78Inch Length.
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