This globe front sight comes complete with 10 different, interchangeable inserts, helping a shooter to achieve an optimum sight picture for specific conditions or situations. The sight mounts to a separate attaching base (sold separately) with a knurled locking screw. Height of the globe is 0.545" from center, not including the attaching base. Aluminum construction with a matte black finish. Notes: Globe front sight comes with 10 inserts and is .545" high not including the mounting baseFront Sight groove measures roughly 16mm wideMounting base must be purchased separatelyMounting base heights are listed in the description for each. Radius dimension in the description refers to the barrel's radius