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I have been assured the inner 16mm rod will thread into the steering gear, and the outer will fit inside the knuckle with no problem.
The 16mm measurement is the diameter of the inner tie rod between the joint and the threaded portion that threads into the outer tie rod. Due to this larger size, the outer tie rod is large (approx. 22mm from my measurement).
The inner comes with the large and small clamps for the boot, and a new jam nut. The outer comes with the new spindle nut.

The part numbers for the tie rods are for either left or right, they are interchangeable.

Just remember, if you get 16 and you currently have 14, you have to change both on one side if either outer or inner breaks.