Free images results:
 

Hub pictures, stock photos and images

 
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USB Stock Photo
USB
Author: Habegerman
Wind Power Stock Image
Author: Nitzu
Spare Wheel Stock Photo
Author: Nickr
 
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Also, here are some commercial RF-licensed images that match your search criteria:  
Usb hub Stock Images
Author: Pixelife
USB hub Royalty Free Stock Image
Author: Coprid
Hub Close Up Stock Photo
Author: Kfb