Binding wire material: special copper, with excellent conductivity, different from aluminum usually used. to inside, which makes this product unique.^ DuPont cables include: 1x40 male to; female, 1x40 male to female male and 1x40 female to female. It is also suitable for industrial/professional applications as our copper blends have superior durability. extremely high.^ Cable Length: Each cable is approximately 20cm with 2.54mm spacing. Each harness consists of 40 individual wires, which can be easily separated from each other and firmly secured in your socket or pin when in use. bles DuPont is suitable for to various applications.With our cables you can easily and reliably connect all modules to the Raspberry Pi or GPIO experiment board on the Arduino. is very good and there is no plastic smell. Circuit testing can be done quickly without soldering. If the terminal is not damaged, it can be reused.