niceEshop(TM) Bike Motorbike Handlebar Seatpost Roll Bar Mount for Gopro 1 2 3 3+ 4 Camera,Black Condition:Brand new;Diameter:3.5-6.5cm/1.4-2.5inch Comes with pivoting arms to allow for 3-way adjustability, allowing you to get the angle you want Fits around any bar from 1.4 to 2.5inch (3.5cm - 6.35cm) in diameter Work for Gopro Hero4, Hero3, Hero2, HD Hero camera;Securely attaches camera housing to Roll Bars, ATV's, roll cages, boats, etc Captures point-of-view perspective from vehicle