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Amazon.com: StarTech.com 4 Port USB 2.0 Hub - Metal Industrial USB-A Hub (4x USB-A) with ESD & Surge Protection - Extended Operating Temp -40 to 185F - Din Rail/Wall/Desk Mountable - USB
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USB hub - Wikipedia
Industrial Grade USB HUB, 4x USB 2.0 Ports, Switchable Dual Hosts US Plug - RobotShop