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