This top mounting Closet Door Roller has tandem 7/8 inch (22.2 millimeter) round edge nylon wheels. The adjustable steel bracket has a 1/4 x 7/8 inch (6.4 x 22.2 millimeter) diameter flat edge horizontal guide wheel. This roller assembly fits on one to 1-3/8 inch (25.4 to 34.9 millimeter) thick Acme “Series 2600” bi-fold and accordion doors.
Acme Part Markings 30-261