This Hatco 04.16.638.00 is a movable nylon roller with a 1-inch diameter and 1-1/2-inch length. 1 It is designed to provide smooth and reliable movement in various applications, including conveyor systems, material handling equipment, and industrial machinery. https://partsfe.com/nylon-roller1-dia-x-1-12-long-for-hatco-part-041663800