17mm Angled Ball-to-Ball Swivel Adapter Arm

This is a 17 mm ball-to-ball extension arm designed to work with 17mm ball and socket mounting parts, commonly used with swivel-mount holders for phones, gps units, and other accessories.  Garmin devices, in particular, often use 17mm ball and socket components.  The arm is angled to allow more horizontal positioning.   The part is printed upright, with its arm sections at angles to eliminate horizontal layer lines and increase strength.  There is also some internal structure intended to st