StarTech.com 8 Port USB to DB9 RS232 Serial Adapter Hub - Industrial DIN Rail and Wall Mountable - USB - 8 x Number of Serial Ports External - 1 x Number of USB Port
StarTech.com USB C to Serial Adapter with COM Retention - USB C to RS232 Cable - USB C to DB9 Cable - Windows / macOS / Linux Compatible - First End: 1 x Type C Male
StarTech.com USB to RS232/RS485/RS422 8 Port Serial Hub Adapter - Industrial Metal USB 2.0 to DB9 Serial Converter - Din Rail Mountable - Industrial 8 port serial hu
StarTech.com USB to RS232/RS485/RS422 4 Port Serial Hub Adapter - Industrial Metal USB 2.0 to DB9 Serial Converter - Din Rail Mountable - Industrial 4 port serial hu