Delta no. 422-04-103-5001. This is the flange washer for the arbor on the Delta Unisaw/ Contractor tablesaws. The bore is a standard 5/8" and the OD is 2 1/2". This will also fit virtually any 10" with a 5/8" arbor. Shipping on this item is free via USPS or UPS. I do combine shipping wherever possible. I do ship internationally. Just email me and I will quote shipping to your country.