To be honest IDK what can I say. I'm not sure how to test if it actually protects against static electricity without risking my parts. What I can say is that I used them to sell my PC on eBay. That was a few months ago and I haven't received a single message from the buyer about non-working parts. I'll take it as a win and say it worked for me.
10 TB External HDD Western Digital WD Elements Desktop, USB 3.0, black
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