Item Type: Round Flange Linear Ball Bearing Model: LMF30UU Material: Bearing Steel Inner Diameter: Approx. 30mm / 1.18in Diameter: Approx. 45mm / 1.77in Thickness: Approx. 64mm / 2.52in Package List 2 x Round Flange Linear Ball Bearing 1Reliable Work: Able to work in conjunction with cylindrical shaft with small operating load and frictional resistance. 2Round Flanges: The round flange base has good bearing capacity, which promises better working stability and accuracy. 3Ball Bearings: The ball bearings in rows form a closed loop, so the operation has low work noise and high efficiency. 4Practical Use: Widely used in digital 12D coordinate measuring equipment as well as various guide rods, columns, etc. 5Good Material: Adopting premium bearing steel material, not easy to deform and has great durability for long term use.