The Marathon/Kulka 599-GP series terminal blocks provide a reliable solution for connecting multiple wires in industrial applications. These blocks feature a phenolic base for insulation, brass screws and terminals for secure connections, and are available with various hardware options to suit different needs. The 599-GP-12-KT28 model specifically offers 12 poles with a 3/8" center spacing and is suitable for wire ranges of #16 to #22 AWG. They are UL Recognized and CSA Certified, ensuring compliance with industry standards. Open back design requires an insulator strip for voltage ratings.