RAM 1 Inch Ball with 1/4-20 Stud for Cameras The RAM-B-237U universal camera and camcorder base consists of a 1" 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:1" Rubber Ball "B" Size Product : RAM MOUNT 1" BALL W/ 1/4-20 STUD FOR CAMERAS Manufacturer : RAM MOUNT Manufacturer Part No : RAM-B-237U UPC : 793442102370