RAM 25mm (1") Tough-Ball™ Base with  6.35mm - 20 x 6.35mm (1/4"- 20 x .25")  Male Threaded Post

• The RAP-B-379U-252025 consists of a 25mm (1") diameter rubber ball, connected to a  6.35mm - 20 x 6.35mm (1/4"- 20 x .25")  male threaded post.
• The male thread matches most standard camera and camcorder female threads found on the bottom of the camera. 
• The Standard Thread Diameter and Pitch Option:-  6.35mm - 20 x 6.35mm (1/4"- 20 x .25")