Stacking header for Raspberry Pi 4, Pi 3, Pi 2, Pi Model B+, Pi A+, Pi Zero, Pi Zero W, Pi Zero 2, Pi Zero W2. Application: It can be used for Raspberry Pi pin expansion, and it can also be used for all 40pin pins. Occasion, such as Tinker board, jetson nano and other standard 40Pin equipment pin extensions, etc. Packing List: 2 * 2x20 Long Female Header (Pin Len: 12mm), 2 * 2x20 Long Female Header (Pin Len: 11mm), 2 * 2x20 in-line female row (Pin Len: 5.5mm), 2 * 2x20 straight Pin Header, 2 * 2x20 90 Degree Curved Pin Header, 2 * 2x20 90 Degree Curved Pin Header,1 * GPIO Edge Extension. The 40pin header kit box is a full range of 40pin component boxes for electronic enthusiasts DIY.