5eBoard Reconfigurable Solderless Circuit Breadboard 4x4 Advanced Kit &ndash; Yellow/Green Board size: 4" x 4" Baseboard color: orange; Assembling block color: green One set contains: 1 baseboard, 48 assembling blocks, a pair of bus lines, two board-to-board fasteners, and a separator Multiple boards can be joined together using provided fasteners for large projects