Product size: The product has an outer diameter of 20mm, an inner diameter of 6mm, and a height of 4mm. Manual measurements, please allow slight errors. Applicability: The product is suitable for M6 bolts and is suitable for Kart Floor Tray. Easy to install: It can be directly replaced without adjustment, with perfect compatibility and high reliability. Product material: The product is specially designed and made of rubber material, with a long service life and is not easy to damage. Product list: Product include a total of 20pcs Washers, which can completely meet your daily use needs and replacement., Manufacturer: Briny River