This is a 3" to 2" reducer for your dust collection system.  The Jet no. is JW1020.  The OD on the big side is 2-15/16 and the small side OD is 1-15/16.  Shipping on this item is free via USPS or UPS. I do combine shipping wherever possible. I do ship internationally. Just e-mail me and /I will quote shipping to your country.