The tinned copper wrapping wire can work perfectly for going through the holes in a breadboard. The color can help make it easy to keep what runs where in check. 30AWG Spec: Outside diameter: 0.254mm/0.01in; Cross sectional area: 0.0507mm²; Resistance: 361/km; 30 Gauge is perfect for low voltage wiring. Using PVC cover material whose heat resistance can be up to 105, safe and reliable; Using tinned copper wire core material which is anti-oxidation, more stable transmission. Suitable for welding wrapping wires of notebooks, motherboards, LCD screens, displays and other circuit boards, winding, making test fixtures. A tool for connecting two nodes on the circuit board directly with wires due to design defects, test purposes or other design considerations.