$ 0 0 The Odyssey BMX "Mr. Clampy V2" Seat Clamp is a slim CNC'd seat clamp which works with one bolt.Material: aluminumDiameter: 28.6mm (fits to BMX frame with 25.4mm seatpost)Extras: CNC machined, 1 bolt clamp9.95 EUR[incl. 19% VAT excl. shipping]