The RAM-A-237U, universal camera and camcorder base, consists of a 0.56" diameter rubber ball, connected to a 1/4"-20 camera thread. The male thread matches most standard camera and camcorder female threads found on the bottom of the camera.
Material: Powder Coated Marine Grade Aluminum
Ball Size: 0.56" Rubber Ball "A" Size
Note: The "U" in the part number reflects product packaged in poly bag.