The RAM-235-2U consists of a double u-bolt base with 1.5″ diameter ball and two zinc-coated u-bolts. The double u-bolt base will accommodate rails from .75″ to 1″ in diameter.
RAM® Double U-Bolt Ball Base for .75″ – 1″ Rails
|Ball and socket size||
C Size 1.5" (Holds 4 lbs)