10 pieces of 12" long jumper wires with a female crimp-on connector on one end and a male pin on the other. Package also includes one 40-pin single row, 0.1" spaced male header that can be broken apart to the sizes you need.
These jumpers are perfect for using prototype PCBs in conjunction with solderless breadboards.
The wires can be daisy-chained to make longer lengths.
Specifications 28AWG, UL1007, 80 °C, 300V