Use these to stack shields on your Arduino! These are standard 6-pin, 8-pin and 10-pin 0.1" spacing female headers...with a twist! The pins are extra long which means you can use these to stack shields! The legs are 10.5mm (0.42") long, so after the PCB thickness (1.7mm/0.07") you have a height of 8.8mm (0.35"). Comes in a package of one 2x3-pin header, 2 x 8-pin headers, 2 x 6-pin headers and 1 x 10-pin header for full compatibility with shields designed for Arduino R3 & Leonardo.Please note, not all shields use the 10-pin connector or 2x3 connector stacking header. For shields that do not use the 10-pin header, use the 2x6 and 2x8 headers.