This pre - owned 30mm bearing cassette from Birel is a great option. It's specifically designed to fit 30mm x 60mm bearings. Sold as is, it offers an economical choice for your needs.

Using this 30mm bearing cassette is straightforward. Just install it in the appropriate place where a 30mm x 60mm bearing is needed. Since it's a used product and sold as is, it's a good idea to check it over before installation. Look for any signs of excessive wear or damage. For maintenance, keep it clean and lubricated regularly. This will help it work smoothly and last longer. Also, store it in a dry place when not in use to prevent rusting.