1steel; 8.875 in. Od; 2.753 in. Id; 9.969 in. Lg; cadmium plate except on 2.753 in. Id; w/ seven 0.578 in. Diameter bo holes, five holes evenly spaced on 8.000 in. Diameter bo circle, two holes 1.876 in. Apart on parallel line 0.468 in. From only flat surface