Product Review

1.Made of  Bearing Steel material, Double Side Rubber Seal Linear Motion Ball Bearing Bushing.
2.Great for linear motion on 3D printer, cnc, and other applications.
3.These ball bearing are fitted with two rubber dust sealed to prevent ingress of dirt, water and foreign matter.
4.Bearings may require lubrication and break in period.
5.Smooth moving, low friction, high rigidity and long life. Economical, easy to maintain replace.

Specifications
Product Name: Linear Bearing
Package Content: 4pcs x Linear Bearing
Material: Bearing Steel, Rubber
Color: Silver Tone
Weight: 108g
Model: LM12UU
Outside Diameter: 21mm
Inside Diameter: 12mm
Length: 30mm