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DB25 Male to Female RS-232 Jumper Box
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DB9 Jumper Box
RS232 click - features a standard RS232 DB9 port and a MAX3232 IC
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RS232 DB25 Male/Female Jumper Box
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D-sub DB9 Breakout Board Connector 9 Pin 2 Row Male RS232 Serial Port Solderless Terminal Block with Positioning Nuts - Walmart.com