NN3 MKII 45-60 + 90 120 degree click stop reversible detent ring (total number of stops around to form 360 degrees n=8-6 n=3-4).
This ring is unique as each side has to options.
Side 1 45/60
Side 2 90/120
You will need to reference the rotator index markings to insure correct detent is being used.
***Will not fit the first generation NN3 and NN3 MK3 rotators***