This listing is for a Post Top Fitter for a 3 inch Pole, Post or Tenon. This light fixture requires a Globe with a 5.25 inch Opening to go over the clamps and to secure properly. The light fixture alone measures 6 1/2 inches in diameter and about 2 3/8 inches in height to the top of the socket. The post top light secures on the post or pier mount with 3 set screws and the globes clamp on to the fixture with a spring action type screw system. This fitter will only work on a post, pole or tenon that is 3" Outside Diameter and is not recommended for anything small or larger than 3 inches. The fitter comes in white or black color and is made of polycarbonate material. The socket can use up to 100w incandescent light. Pier mount, post, post tenon, tubing or globe is not included.