R142RSMTSRLJAF Nachi (JAF) Sealed Nachi Bearing 7/8" x 1 7/8" x 1/2" inch Made in Japan R142RSMTSRLJAF Nachi (JAF) Sealed Ball Bearing, inner diameter is 7/8" inch, outer diameter is 1 7/8" inch and width is 1/2" inch, Made in Japan.