K-EDGE GO BIG Pro Handlebar Mount for GoPro Hero (K13-420 Blue) Made in the USA. CNC Machined 6061 T6 Aluminum Weight - 46 grams, super light, super strong,Compatibility - fits 31.8mm diameter bars, all mounting hardware included Two position design - in front and below or in front and above handlebar Lifetime Guarantee - if you break it, we will replace it