Product size: product diameter is 110mm, hole diameter is 16mm, height is 21mm, Manual measurements, please allow slight errors Applicability: This product is suitable for most lawn mowers. Wide application: This product can also be applied to gardens, sidewalks, lawns, plant walls, parking lots, and clearing low grass. It is suitable for low grass and makes the grass grow more neatly. Easy to install: It can be directly replaced without adjustment, with perfect compatibility and high reliability. Product material: This product is specially designed and made of aluminum alloy, with high service life and not easy to damage., Manufacturer: The Lord of the Tools