The RAM-A-230U, double ball joiner, consists of a 0.56" rubber ball on both ends that allow the connection of two 0.56" socket arms.
Material:
Powder Coated Marine Grade Aluminum
Ball Size:
0.56" Rubber "A" Ball Size
Note:
The "U" in the part number reflects product packaged in poly bag.
A size 9/16" (Holds up to 0.5 lb)
Powder Coated Marine Grade Aluminum
Adapter
Packaged in Poly Bag