The solderless breadboard in the breadboard kit is suitable for DIY , you can use it with breadboard jumpers and breadboard power supply for DIY, testing, experiments, robots, toys and games.SpecificationMaterial: ABSSize: 55x83x9.5mm / 2.17x3.27x0.37 inch (W*L*H)A terminal strip: 400 jackAdvantageEasy to fix breadboard jumpers, easy to use breadboard holder, suitable for pi breadboard kit. The holes are aligned consistently; each row and column has corresponding letters and numbers, easy to insert pins.InstructionThe connectors are nice and has a good grip. You can just leave your circuit on the breadboard if you don't want to transfer it to a perfboard or a PCB.NOTE:Our store has different styles, sizes and colors to choose from.