Global Specialties PB-103E Externally Powered Breadboard systems offer students of electronics an economical choice for breadboarding without sacrificing quality. Global's economy line plastic sockets with phosphor-bronze contacts are mounted to anodized aluminum back plates of the PB103E for added durability. Plastic feet and color-coded binding posts are included. The PB-103E breadboard has 2250 tie points. Use the PB 103E breadboards to design test fixtures, perform lab experiments and in all areas of custom electronic design applications. Some assembly required.