The bottom portion of this bracket has a 2 1/2 inch inside diameter allowing it to slip fit over any 2 3/8 inch tenon regardless of the shape of the pole. Each curved arm has a 2 3/8 inch outside diameter allowing any light fixture with a standard 2 3/8 inch slip fitter to slide over. Bottom portion options that fit over a 2 7/8 inch or 4 inch tenon are available, contact sales for a custom quote. This bracket is available with a standard dark bronze finish however other powder coat finish options are available. Hot dip galvanizing is also available as a custom request.