This deluxe wire kit contains 25 pieces that each of them has 14 different lengths, 350 in total. The case is compartmentalized and has a lid. This set has enough wire for large projects or several smaller projects. Pre-cut and pre-stripped wires simplify and speed up breadboarding work. Having exactly the right wire lengths for the job also makes your projects much neater, more reliable, and easier to debug. These wires are compatible with standard breadboards.