Depending on the application requirements and available space, one PSL model may be better suited for your specific application as compared to another.  Some key features to consider are:
Flanged or Flangeless Design
Torque Capacity
Sizes available – small, large, english, metric
Material options (steel, nickel-plated, stainless-steel)
Contact pressure / hub size requirements
Download the PSL catalog for more details or contact the factory for assistance in choosing the optimal PSL for your application.