It serves as a rubber plug that will close the usb opening. But very difficult to remove once you tightly close it unless you have long finger nails. Only a small dot of rubber size of a head of a paper pin.
Verified purchase: Yes | Condition: New
I bought these for a little over a dollar (US). They are good for that price. I see the price is now about 20x higher. That is not worth it.
Verified purchase: Yes | Condition: New
The dust caps keep the USB plugs clean.
Verified purchase: Yes | Condition: New
They seem durable and add drop resistance.
Verified purchase: Yes | Condition: New
Perfect to protect your USB cable terminals
Verified purchase: Yes | Condition: New
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