40 pcs 20 CM bread board wires or 40 pcs 10 CM board wires . (B.3)
Male ends have a pin protruding and can plug into things, while female ends do not and are used to plug things into. Male-to-male jumper wires are the most common and what you likely will use most often. When connecting two ports on a breadboard, a male-to-male wire is what you'll need.