Outside Diameter: 30.9mm/ 31.6mm. Upper routing about 625g(30.9mm)/640g(31.6mm). Bottom routing about 655g(30.9mm)/670g(31.6mm). Weight for seat post only. My goal is to make sure you are a happy customer and pleasant shopping with us.Items must be in original box and kept in good condition. This item is in the category "Sporting Goods\Cycling\Bicycle Components & Parts\Seatposts". The seller is "zdl-kabusikikaisya1989" and is located in this country: US. This item can be shipped to United States.