This 40-pin (2×20) flat ribbon cable connects to the GPIO header on Raspberry Pi models with the 40-pin layout. The keyed connectors ensure correct polarity when connecting to breakout boards, HATs, or prototyping accessories. Key Features 40-Pin Connection – 2×20 configuration for full GPIO access Keyed Connectors – Polarised for correct orientation 0.1" Pitch – Standard spacing compatible with breadboards and breakouts 6" Length – Provides flexibility for project layouts Specifications Connector: 2×20 pin (40-pin total) Pitch: 0.1" (2.54mm) Length: 6 inches (15cm) Type: Flat ribbon, keyed Compatibility Raspberry Pi 5, 4, 3, 2 Raspberry Pi Model B+, A+ Raspberry Pi Zero / Zero W / Zero 2 W Any board with 40-pin GPIO header Ideal For Connecting Pi to GPIO breakout boards Prototyping with breadboards Building projects in enclosures Resources Datasheet (PDF)