The RAM-B-239U consists of a 1" diameter rubber ball, connected to a 5/16"-18 threaded post.
Material:
Powder Coated Marine Grade Aluminum
Ball Size:
1" Rubber "B" Ball Size
Note:
The "U" in the part number reflects product packaged in poly bag.
B size 1" (Holds up to 2 lbs)
Powder Coated Marine Grade Aluminum
Adapter
Packaged in Poly Bag