Insignia™ 1.3' USB-to-RS-232 (DB9) PDA/Serial Adapter Cable, with Prolific Chipset Black NS-PU99501 - Best Buy
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ATEN USB Type-A Male to RS-232/DB-9 Serial Male Adapter UC232A
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Mettler Toledo RS232 to USB Converter Cable for XPR Microbalances and Ultra-Microbalances | Fisher Scientific
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USB 2.0 to RS232 Serial DB9 Converter - Black - Tera Grand
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USB 2.0 to RS232 Converter Cable, USB Type A Male to DB9 Male, PVC (Polyvinyl Chloride), 1-Meter
USB 2.0 RS-232 Serial Adapter with LED Indicators
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StarTech.com 3ft (1m) USB to Serial Cable, DB9 Male RS232 to USB Converter, USB to Serial Adapter, COM Port Adapter with Prolific IC, 1 (Quantity) - Walmart.com
USB to RS232 Adapters (FULL SPEED) — Connective Peripherals - Global Store