Marathon Special Products terminal blocks are high-quality, reliable electrical components used to secure and organize electrical wiring in various industrial, commercial, and residential applications. These terminal blocks are designed to simplify wiring connections, provide electrical safety, and enhance the efficiency of electrical systems. Marathons 1321122 is a stud to stud one pole terminal block. It has a wire range on the line side of 1/4 - 20 X 9/16 stud and on the load side 1/4 - 20 X 9/16 stud. It is rated for up to 200A and 600V. The terminal block is rated 10,000A short circuit current. The insulation material is thermoplastic and the bus bar is copper, tin plated. This 1321122 distribution block is RoHS complaint.