Specifications: Can be used repeatedly. Can be easily split to make different number of wires depending on your requirements. These jumper wires can be used with electronic projects, on a solder-less breadboard and direct to circuit board headers. Suitable for 2.54 mm spacing pin headers. Type: Dupont Wire Material: Silastic Shell Optional Type: Male to Male, Male to Female, Female to Female Compatible with: for Arduino Length: 10cm/3.94", 20cm/7.87", 30cm/11.81" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x 40 Pin Dupont Wire