60 Pieces Breakaway Pin Header, 40 Pin 2.54mm Straight Single Row Male Pin Header Connector for Arduino Prototype Shield: Amazon.com: Industrial & Scientific
Amazon.co.jp: Pin Header 2 x 23 = 46P Gold Plated 0.1 inch (2.54 mm) Pitch Between Board 11 mm Pack of 2 : DIY, Tools & Garden
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
Amazon.co.jp: Female Pin Header, Connector and Pitch Female 2 Row Short Pin Header for Raspberry Pi (5 pcs 2 x 20 pin 2.54m) : DIY, Tools & Garden
Amazon.co.jp: uxcell Pin Header Straight Male PCB 40 Position 2mm Spacing 5pcs : Industrial & Scientific