Keebar Tin Plated Aluminum Transformer Connector, Wire Size 1/0 - 1000 kcmil, Aluminum and Copper, Bolt Size 1/2 inch, Two Conductors, Two set screws per outlet. Height 8-3/8 inch, Depth 3-5/8 inch, Length 1-5/8 inch. Includes Hardware - Four Tin Plated Screws 7/8-14 x 1-5/16 inch. Oxide Inhibitor. Two 9/16 inch diameter Mounting Holes - on 1-3/4 inch centers.