I have an interest in electronics and 3D printing and make a lot of small motorized devices. Almost all require high quality bearings to eliminate friction between slightly worn plastic parts. I've looked through hundreds of these specific bearings and found that they are durable, strong, and the same size, allowing me to design anything with the exact same sizes for whatever bearings are needed. They can handle fairly heavy loads with no problems. It is ideal value for money for a wide range of general purpose applications. I recommend them for hobbyists like me. One note: the description says "red" but the last two batches I bought actually had yellow on the sides. So if you really need red, you might be disappointed when they show up.
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