Geeetech

Yes, you are right. But I did not bought them for a 3D printer. I want to build other device.
And I spent 3 nights researching the difference between different NEMA17 stepper motors and decided to buy 42SHD0217-24.
After 3 weeks I received a different product (42HS3418-24B20).
To my surprise, is ...

They are different stepper motors. I also ordered the 42SHD0217-24 stepper motor on ebay and received 42HS3418-24B20.
As you can see in this picture, the 42HS3418-24B20 has almost 20% less magnetic sheets.

Also the coil resistance is 1,5ohm instead of 2,5ohm.
I cannot confirm, but I think the ...