Short Feather Male Headers - 12-pin and 16-pin Male Header Set : ID 3002 : $0.50 : Adafruit Industries, Unique & fun DIY electronics and kits
10PCS 40 Pin 2.54mm Pitch Breakway Male & Female Pin Header Kit Straight Single Row PCB Board Connector for Arduino Prototype Shield: Amazon.com: Industrial & Scientific
DIYhz Male and Female Pin Header (5pair) Gold Plated (ROHS) Single Row Round Pin 1 * 40 40P Straight Needle Male PCB Pin Header 2.54 mm Male Pin Header Connector Gold Used
4-PIN CONNECTOR W/HEADER, 0.156" | All Electronics Corp.
PiBorg | 40-Pin Female Header
Extra-long break-away 0.1 16-pin strip male header (5 pieces) : ID 400 : $3.00 : Adafruit Industries, Unique & fun DIY electronics and kits