This is a pair of MR106 ball bearings which can be used to retrofit MG996R servos which have plastic/metal bushings.
The MG996R servos that I sell, and indeed, basically all other sellers (regardless if they say so or not), have a pair of bushings on the main shaft, one plastic at the base and one metal at the top. Some people prefer to have ball bearings, these are the correct ones to replace.
The job only takes a couple of minutes to do, and I wrote a detailed guide with pictures to help you
See how to replace MG996R Bushings with Ball Bearings in this How To guide.
Hmm. Anything else to say…. not really, these are Chinese bearings, I’m not a bearing expert, they seem totally fine to me, but if you don’t like the bearing quality when you examine them let me know and we can sort something out, no worries.
Servo not included, but I sell those too
All of our products are shipped from Christchurch, New Zealand using CourierPost for NZ, and Airmail for international.