RPI GPIO 1TO2: Raspberry Pi - GPIO header, 1 on 2, 40-pin, RM 2.54 at reichelt elektronik
Raspberry Pi GPIO Adapter 40 Pin | Borja Home Page
For Raspberry Pi 4b 3b Plus Gpio 40 Pins Breakout Expansion Board Cable Breadboard Adapter T Shape Development Board 40p Cable - Pc Hardware Cables & Adapters - AliExpress
40 Pin GPIO Extension Cable for any 2x20 Pin Raspberry Pi [150mm / 6 long] : ID 4823 : $2.95 : Adafruit Industries, Unique & fun DIY electronics and kits