This Sliding Glass Patio Door Roller has a 3/4 inch (19.1 millimeter) wide, 1-1/8 inch (28.6 millimeter) tall adjustable steel housing assembly. The nylon ball bearing roller is 5/16 inch (7.9 millimeter) wide. This patio door roller assembly fits on doors manufactured by Ador/HiLite and many other patio door manufacturers.