2x 2208 tmotor brushless gimbal motors http://www.getfpv.com/motors/brushless-gimbal-motors/tiger-gb2208-80-brushless-gimbal-motor-hollow-shaft.html)
1x Gopro hero 3 (black, white, whatever)
1x Gimbal controller such as evvgc (stable, hard to set up) or alexmos (expensive, more features, still needs a bit of tuning like evvgc)
4x Vibration damping balls (http://www.amazon.com/gp/product/B00FJSA2Y2/ref=wms_ohs_product?ie=UTF8&psc=1)
Mounting screws for motors (2.5mm for rotor, 3mm for stator)
This gimbal is designed for tiger 2208 motors (27.5mm diameter, 22mm length), but is compatible with many different brushless gimbal motors. Note that the design only works with the standard 12mm hole spacing on the rotor and 16mm or 19mm on the stator.
Required hardware: 2x m3 x 6mm, 2x m3 x 14mm, 4x m2 x 8mm (these are recommended lengths, find the length that best fits your motor)