For sale is a Set of (2) Polymer Belt Rollers with attached (removable) Mounting Plates. Each roller is 3-1/2" in diameter and 2-1/4" wide. One roller runs on a steel shaft in (2) bearings. One roller runs on a steel shaft in a bronze sleeve. Several roller sets available. NOTE: Some of these rollers are black, some are white. Great for projects, like a belt sander or conveyor