Thank you for viewing. Yokozuna brand door rollers Stainless steel frame [SUS304] Frame length: 68 mm, width slightly larger than approximately 13 mm Mounting hole: Approximately 4 mm, countersunk for approximately 6 mm Mounting hole center distance: Approximately 57 mm Wheel: Resin Wheel size: Diameter 30 mm, width slightly larger than approximately 8 mm Wheel shape: Flat *Please note that the wheels do not contain bearings. Quantity: 8 pieces These items have been stored in a factory for a long time. They are used but unused, and there is some dust and debris inside the wheels. If you are looking for items in new condition, please purchase new ones. I searched the Yokozuna catalog, but there are no similar items, so the size measurements are approximate. We cannot guarantee the functionality of the door rollers, so please consider purchasing only if you understand this. We strive for smooth transactions. Please feel free to comment if you have any questions.