[Model]：Pick up the model according to assembly method. Assembly： 1. Plane mounting：GAK、GBK、GEK、GAF、GBF、GEF、GSW、GSWE、GUN、GTN。 2. Suspension and spindle mount：GFK、GFF、GRWE、GUR、GTR。 [Size]：Decide the size according to the ballscrew shaft O.D., and the center height. [Grade]：Standard and economic types for options. [Surface Finish]：Black dyed - Regular environment use, low humidity. Nickel plating - Clean room use. [Bearing category]：Available Japanese series and Taiwanese series. | 
