RAM Tough-Ball with Coupling Nut for WeBoost AntennasThis weBoost Kit Ball adapter consists of a C size 1.5" diameter RAM Tough-Ball ball connected to a 3/8"-24 x .375" male threaded post with a coupling nut and two lock washers. The ball is compatible with all RAM C Size ball & socket components, allowing you to secure your weBoost antenna in virtually any location.