The Global Specialties economically-priced transparent bus strips connect easily by way of molded key tabs to other economy line breadboarding sockets, or bus strips. The transparent ABS plastic sockets are perfect for educational applications because they allow student and designers to clearly view circuit connections. Most bus strips come with red and blue lines indicating continuity and allow for convenient and easy viewing of circuit connections. Use bus strips for signal and power connections in breadboarding experiments and circuit design. Sockets are made of ABS plastic and phosphor-bronze contacts. Read Less...