RAM Mount Camera Mount w/Suction Base 1/4" - 20 Thread [RAM-B-166-237U]RAM Twist Lock Suction Cup Mount with 1" Ball Adapter that contains a 1 4" 20 Thread for Cameras The RAM B 166 237U consists of a 3. 25" suction cup locking base, double socket arm and 1" rubber ball that contains a 1 4" 20 camera male thread. The male thread matches most standard camera and camcorder female threads found on the bottom of the camera. The mount contains adjustment points at both ends of the double socket arm; this allowing for almost