Toughsty&trade; Black Bike Handlebar Seatpost Pole Mount for Gopro Hero 3 2 1 Camera Accessories New and high quality;Bike Handlebar Seatpost Pole Mount for Gopro Hero 3 2 1, max for 4cm diameter Suitable for GOPRO Hero 3/2/1 Easy to install and use Superior material for long-term use A best gift for cameraman and outdoor activity enthusiast