Specifications:It is made of high-grade copper and aluminummaterial which is safe and durable to use.The cables can be separated to form an assembly containing the number of wires you require for your connection and to support non-standard odd-spaced headers.The male ends meant for insertion into standard 0.1"(2.54mm) female sockets and the female ends are meant for insertion onto standard 0.1"(2.54mm) male headers.Item Name: Rainbow CablesMaterial: Copper, AluminumStyle:Female-FemaleMale-FemaleMale-MaleQuantity: 40PcsFeatures:Multicolored, Flame Retardant, PortableSize: 20cm x 10cm x 1cm/7.87" x 3.94" x 0.39" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:40 x Rainbow Cables