StarTech.com 4 Port USB 3.0 PCIe Card w/ 4 Dedicated Channels - UASP - USB 3.0 PCI Express Card Adapter - USB adapter - PCIe x4 - USB 3.0 x 4
StarTech.com 4-Port USB 3.0 PCI Express Card Adapter - PCIe SuperSpeed USB 3.0 Expansion Card w/ 2 Dedicated 5Gbps Channels (PEXUSB3S42V) - USB adapter - PCIe x4 - USB 3.0 x 4
The ST4300USB3GB 4-Port SuperSpeed USB 3.0 Hub allows you to add 4 additional USB 3.0 ports from a single USB 3.0 connection to the host computer system.
StarTech.com 4 Port USB A Female Slot Plate Adapter
This durable USB Plate converts the USB pins from an AT-style Pentium (or newer) motherboard to 2 standard USB A-Style sockets - a cost-saving solution that provides the missing link to PCs that have USB capability built-in, but no connectors on the PC...
StarTech.com 4-Port USB-C Hub, 4x USB-C Ports, USB 3.1 10Gbps, Portable USB C Hub with 100W Power Delivery Pass-Through, Portable USB Type C Hub w/ 9.8in (25cm) Wrap-Around Cable - USB Expansion Hub (HB31CM4CPD3) - hub - 4 ports
StarTech.com 4 Port USB C Hub, USB-C to 4x USB 3.0 Type-A Ports with Individual On/Off Port Switches, SuperSpeed 5Gbps USB 3.1/3.2 Gen 1, USB Bus Powered, Portable, 10" Attached Cable - Windows/macOS/Linux (HB30C4AIB) - hub - 4 ports
StarTech.com 4 Port USB C Hub - USB-C to 4x USB-A - USB 3.0 Hub
This 4-port USB KVM Switch lets you control multiple USB based computers from a single console (USB keyboard, USB mouse, monitor).
StarTech.com 4 Port USB to DB9 RS232 Serial Adapter Hub - Industrial DIN Rail and Wall Mountable