V Groove Bearing Ball Bearings 20pcs V623ZZ Double Shielded Guide Pulley Rail for Linear Motion Systems 3×12×4mm

[Deep V groove]:The bearings have 1.4mm deep V groove that generally ride on a rail or track. [Double shielded]:Double shielded designed, which can avoid contaminants entering and save lubricant. [Long service life]:These bearings are made from high quality carbon steel for durability, which ensures a long service life. [Dimension]:Inner diameter is 3mm / 0.12inch, outer diameter is 12mm / 0.47inch and the height is 4mm / 0.15inch. [Application]:Thesed bearings are widely used in many linear motion systems., Manufacturer: Walfront