Just what I needed,
Verified Purchase(What is this?)
This review is from: 25 Pcs Anti Dust Black Soft Plastic Dock Cover Micro USB Port Ear Jack (Electronics)
Although I would have liked for them to be rubber rather than solid plastic (I suppose you get what you pay for!), they do exactly what I want and keep the dust out of the USB port on my Moto G. Plenty in pack if I lose any too.