I ordered many times and I found there are 50% of order in this part not working when I use.
This product have QC problem and I have to repeate order to claim to my customer without warranty from product owner. it seems to be properbility or take risk by myself to find good part when I ordered this item.
The seller responded very well, provided complete information, replied quickly, and gave detailed advice on how to use the motor. I'm very impressed with the service.