This is a single-row 40-pin female header/pin header. You can cut it to your desired size with a wire cutter. The standard pitch for this header is 2.0mm. Technical Specs Number of Pins: 40 Pin Spacing: 2 mm Strip Length: 80.60 mm Strip width: 2.49 mm Strip Height: 6.8 mm (with contact Points)

These are 40-pin 20cm female-to-female jumper wires. A very flexible and easily detachable cable to the number of wires per your requirements. It has a female connector on each end. It also supports pin headers with a 2.54mm pitch. Technical Specs Cable Type : Female to Female Number of Pins: 40 Length : 200mm