The UBS-100 is Global Specialties largest single breadboard. The UBS-100 offers multiple bus strips and large socket area with 840 tie points. A permanent molded-in tie point numbering system allows the user to see at a glance where to tie wires and add connections. Each socket is made of durable polystyrene and nickel-silver contacts for the highest quality circuit connections. The UBS-100 comes with a heavy-duty Mylar backing to prevent short circuits Read Less...