When viewing the wheel balance of the bicycle, we install the NSK bearing F696ZZ on the hub axle of the front wheel, but we put it between the hub and the bearing to reduce contact resistance. It can turn smoothly without disturbing the rotation of the bearing.
There was a better result than I expected. I tried going to neighborhood home center and electric material store, but it was not available, it was saved because I could get it immediately with monotalou.
The entrance door closer about 15 years ago has broken. When investigating the cause of the failure, a disc spring was used for the moving part of the arm, which was broken. I purchased this product of almost the same standard and exchanged and it got fixed without any problems. It was very helpful.