1.27mm Pitch 2P-40P PCB Male / Female Pin Header Single / Double Row Connector | eBay
Amazon.com: Chanzon Round Pin Header Strip for Arduino Gpio 4 pin x 50pcs Male Headers Pins Straight Single Row Gold Plated Pitch 2.54mm 0.1 inch Breakaway for PCB Connector Raspberry pi Machine
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SWD 0.05 Pitch Connector - 10 Pin SMT Box Header : ID 752 : $1.50 : Adafruit Industries, Unique & fun DIY electronics and kits