3 Way Pivot Arm Assembly Extension+4x Thumb Knob For Sjcam Sj4000 Sj5000 Gopro

3 Way Pivot Arm Assembly Extension+4x thumb knob for SJ4000 Description: Specification: Color: Black Material Plastic + metal Compatible Camera Models Gopro Hero1/2/3. Link with waterproof shell, bicycle, etc Used for SJ400 Car DVR and SupTig outdoor sports camera Functions Can connect with related accessories, such as waterproof case.Can install to the bicycle. Package Included: 3 X Long Screw Bolts 1 X Short Screw Bolt 1 X Long Chain 1 X Short Chain