5eBoard Reconfigurable Solderless Circuit Breadboard 4x4 Advanced K-16 & DIY Kit &ndash; Violet/Blue Board size: 4" x 4" Baseboard color: violet; Assembling block color: blue 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