About this item: 
6 Colors of Solid Core Wire 22 AWG - Perfect for prototyping circuits and ideal as breadboard hookup wires. Due to its solid core, the wires are easier to insert into the breadboard holes and plated through the holes of printed circuit boards. 
Made of Tinned Copper - The benefits of having tinned copper wire include protection against corrosion, ease of soldering, and providing the same conductivity as bare copper. 
Uniformly Coated with PVC - The uniform insulation makes the wire easy to strip and cut. The PVC insulation provides high flexibility, resistance to acids, oils, alkalies, moisture, and fungus, and offers good abrasion resistance. 
Bonus Items and Convenient Dispensing Box - The kit includes a heat shrink tube kit, a mini wire stripper tool, and colored cable ties, which may be used for other everyday projects. The wires are in a durable color-coded dispensing box that keeps the spools organized, easily dispensed, and tangle-free.