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Manhattan USB to Serial Converter - USB port Type A male to RS232 port 9-pin male - Easily connect most serial modems, digital cameras, label writers, card readers, barcode scanners, palm PCs
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Mettler Toledo RS232 to USB Converter Cable for XPR Microbalances and Ultra-Microbalances | Fisher Scientific
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USB to Null Modem (Cross Wired) RS232 Serial Adapter FTDI ft232r USB RS232 to DB9 Female Adapter Cable PC Control TV Cable|Computer Cables & Connectors| - AliExpress
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