This adapter has a 3.2" (8.19cm) diameter and a height of 3 inches (7.7 cm). Includes a removable brass 5/8" x 11 male stud that is adjustable in azimuth and held in location by two set screws. The adapters are leveled by three screws with a tilt range of ±7°. The height above the pivot point to the stud shoulder is 1-3/8 inches (3.5 cm). The height below the brass 5/8" stud to the shoulder is 7/16 of an inch (1.2 cm). The axis height is engraved on the outside of the monument.