This replacement 8 inch OD smooth rubber contact/drive wheel is 2 inches wide and fits the Radius Master 48 inch belt grinders. There are two styles to choose from. The current style is flat on one face and has a flange with a height of approximately 1.66 inches. Older machines will have two flanges with heights around 0.6 inches and 0.7 inches. Please be sure to check your current wheel before ordering.