Used as a top roller assembly on pocket door systems, and designed to fit E-Z Guide 5/16 inch x 1-1/4 inch outside diameter on 2-1/2 inch x 1-3/8 inch base Convex edge wheel (round edge) with a ride height adjustment of 1-13/16 to 2-1/4 inch Constructed of a plastic wheel with steel ball bearings, assembled to a steel bracket housing Please refer to the line art drawing for dimensions and compare with your needs item before purchasing (Not Universal)