1).Linear Ball Bearings High Precision and Rigidity Linear Ball bearing is produced with a solid steel outer cylinder.Also the retainer includes rolled steel plate retainer or industrial strength resin retainer. 2).Linear Ball Bearings Ease of Assembly The standard type of linear ball bearings can be mounted from any direction and work accurately only through the shaft supporter. Nanbo also provides all kinds of housing for different Linear Ball Bearings. 3).Linear Ball Bearings complete range of types Nanbo provides a full of linear ball bearings:the standard,the clearance adjustable type,open,Double-retainer,and flanged types.