CNC part MR12 12mm linear rail guide MGN12 length 600mm with mini MGN12H linear block carriage miniature linear motion guide way (press the block to slide) Go to amazon.com Related posts Top 10 recommendation mgn12 600mm linear rail FeatureBrand new& High quality. DescriptionPackage content: 1pcs MGN12H-600mm 1pcs MGN12H block