SER205-16 is a SER200 Series Set Screw Locking Bearing Insert that is Pre-Lubricated with Grease making it ready for use upon arrival. SER205-16 Insert Ball Bearing has two set screws which allows it to tighten against the shaft once it is fitted properly and grease feeding groove for re-lubrication of the bearing. SER200 Series Insert Bearing features either a Cylindrical or Parallel Outer Diameter and comes to the exact fit of a snap ring which facillitates the axial location of the bearing in its housing.