They appear to be very well made and are an accurate size. Used to replace wheel bearings in a bogie and the wheels have never turned so well. Can't say much about durability having only installed them for about 2 weeks but so far they are as tight and smooth as the day they were installed.
๐ง High-Quality TIMKEN 6203 2RSC3 6203 2RS Bearing - Size: 17X40X12mm
4 Review
๐ Wheels Manufacturing Ball Retainer Bag: Convenient Storage and Protection for Your Ball Retainers
6 Review
Electric Guitar Strings Ernie Ball 2221 Regular Slinky - (10-46)
5 Review
Linear Clamping Support Bearing by Sydien
4 Review