4PCS Solderless Breadboards - 2PCS Full-size and 2 PCS Half-size bread boards to meet your experimental needs. Solid and Reliable - White ABS Plastic solid body with clear printed labels for rows, columns and buses. Snugly but Lightly - Snugly enough to hold electronic components in place, but lightly enough to remove them. Fixable Design - With self-adhesive tape on the back, easy to permanently stick the breadboard to a robot. Bread Board Circuits Kits are suitable for (flexible) jumper wires and solid-core hookup wires (Recomended 22 AWG).