Prime-Line Products B 610 Spring Tension Roller Assembly， 1 in. Outside Diameter， Concave Edge， Steel Ball Bearing<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>This steel ball bearing roller assembly is used as a top and bottom roller to replace damaged or missing rollers on sliding screen doors</li><li>Housing width is 2 in. x 3/8 in. thick with 1/4 in. wide wheel at 1 in. outside diameter</li><li>Concave edge wheel (center grooved)</li><li>Constructed of steel</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41QcD881avL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41eKtBqFtDL.jpg" noproxy>