This is the 5th generation bidet. Select bidet size using the chart below. All parts are in North America Standard. You may download and review the manual first here.The item "Dib-2500 Luxury Enema Bidet Electronic Toilet Seat (Elongated Only) MSRP$699" is in sale since Monday, March 10, 2014. This item is in the category "Home & Garden\Home Improvement\Plumbing & Fixtures\Bidets & Toilet Attachments". The seller is "warehouse8deal" and is located in North Bergen, New Jersey. This item can be shipped worldwide.