The RAM-B-237U, universal camera and camcorder base, for ACTIONPRO SD20F and others 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.

Compatible Cameras:
ACTIONPRO SD20F
Contour GPS
Contour HD
Gobandit GPS-HD
GoPro HD Helmet HERO
GoPro HD Motorsports HERO
GoPro HD Surf HERO
GoPro Helmet HERO Wide
GoPro Motorsports HERO
GoPro Motorsports HERO Wide
GoPro RC HERO
GoPro Surf Hero
GoPro Wide HERO

Material:
Powder Coated Marine Grade Aluminum

Ball Size:
1" Rubber Ball "B" Size