Unique Bargains 4 Pcs LM4UU 4mm IDx8mm ODx12mm Length Linear Ball Bearings Silver Tone

Features: Pre-lubricated, smooth and flat bearing surface, compact structure, with strong bearing capacity and dust-proof, long service time. Suitable for high-speed, low friction, low-noise and low vibration, improve efficient and steady work. High temperature quenching forging, sturdy and durable in operation, these deep groove ball bearings combine radial and load at high speed. Mainly applicated with guideways of linear tables, 3D printers rail unit, engraving machines and other common machine guideway etc. Package Includes: 4 Pcs Linear Ball Bearings.