Gopromate(TM) Bicycle Bike Handlebar Seatpost Pole Mount for Gopro HD Hero3 2 1 Camcorder Gopro Ride Hero Handlebar Seatpost Pole Mount (Max for 4cm diameter). 100% brand new and high quality Bicycle Bike Ride Handlebar /Seatpost Pole Mount. Durable structure, and easy to install and use. Only 1 Bicycle Handlebar / Seatpost Clamp included in this list Compatible with All GoPro HD Hero 3 /Hero 2 / Hero 1 camera.