TELESIN Large Diameter Handlebar Seatpost Three-Way Adjustable Pivot Arm for GoPro Roll Bar Mount for Hd Gopro Hero2/3/4/5 The replacement Handlebar / Seatpost Pole / Bike / Roll Bar mount for GoPro HD Hero, Hero2 or Hero3 Securely attaches camera housing to Roll Bars, ATV's, roll cages, boats, etc Fits around any bar from 1.4" to 2.5" (3.5cm - 6.35cm) in diameter Captures point-of-view perspective from vehicle Comes with pivoting arms to allow for 3-way adjustability, allowing you to get the angle you want