![0.1" (2.54mm) Male header 1 row / 40 pins](https://hackspark.fr/1062-large_default/01-254mm-male-header-1-row-40-pins.jpg)
This is a simple male header, very useful for a lot of things, including to plug boards like the arduino on your protoboards.
2.4mm spacing, 1 row, 40 pins. 11 mm Header Pin Male
This is a simple male header, very useful for a lot of things, including to plug boards like the arduino on your protoboards.