Garmin Virb & Virb Elite Action Cameras. Angled 18° results in the extension arm being parallel to the gound. Allows Virb to be mounted above or below the extension arm. I do not own a Virb so these are based on someone else's dimensions.Assembly requires two M2.5 x 16 mm socket head cap screws and M2.5 nylon locking nuts. Attachment to camera uses any GoPro compatible thumbscrew 5 mm and 5 mm acorn nut.