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Amazon.com: 2X 40 PIN GPIO Header Adapter Color-Coded Header Expansion Board for Raspberry Pi 400,Easy Expansion : Electronics
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GPIO Header for Raspberry Pi A+/B+/Pi 2/Pi 3/Pi 4/Zero [2x20 Female Header] : ID 2222 : $1.50 : Adafruit Industries, Unique & fun DIY electronics and kits
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Amazon.com: 40 PIN GPIO Header Adapter Color-Coded Header Expansion Board for Raspberry Pi 400,Easy Expansion : Electronics
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Raspberry Pi 40 Pin Gpio Extension Header Double Row Right Angle Gpio Edge Extension Connector For Pi 4b 3b+ 3b Zero 2 W - Demo Board Accessories - AliExpress
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Amazon.com: GeeekPi Micro Connectors Raspberry Pi 40-pin GPIO 1 to 2 Expansion Board 2 x 20-pin Strip Dual Male Header Double Row Straight GPIO Connector Pin Header Compatible with Raspberry Pi(2Pack) : Electronics
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