Global Specialties Economy Line solderless breadboarding 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 for added durability. Plastic feet and color-coded binding posts are included. Global's externally-powered solderless breadboards have tie point capacities ranging from 830 to 3060 tie points. Use Global's solderless breadboards to design test fixtures, perform lab experiments and in all areas of custom electronic design applications. Some assembly required.