ICAN Carbon Fiber Seat Clamp 34.9mm/31.8mm for 31.6mm/27.2mm Seat Post 15mm Height for bike type: Cruiser, Cyclocross Bike, Mountain Bike, Road Bike, fatbike Max Torque: 6Nm Constructed from lightweight carbon fiber T700 Inner diameter 34.9mm fit for 31.6mm Seatpost, 31.8mm for 27.2mm Weight: 14g