Diameter: approx. 2.79 cm. Inner diameter: approx. 1.52 cm. Quantity: 4 pieces Ball bearing piece C60 (C -60): This ball bearing for pool cleaner is perfectly compatible with 180 and 280 pressure washer wheels. Replacement parts: This C60 ball bearing is suitable for pool cleaner Zodiac Polaris 180, 280 swimming pool. Quality assurance: Replacement parts are made of high quality, durable materials and have been thoroughly tested by the manufacturer. Save time: This replacement part is of the highest quality and easy to install You can save money and time. Scope of delivery: The package includes 4 or 8 pieces bearing wheels for Polaris 280 180 pool cleaner. Features: Name: Ball bearing for Pool cleaner. Material: Plastic. Compatibility: (for reference only). Alternative to Polaris part number: C60 C- 60. Compatible with Polaris 180 and 280 models. Contents: 4 Pool Cleaner Ball Bearings or 8 Pool Cleaner Ball Bearings. Notes: Due to lighting effects and shooting angles, the item's color