The RAM-B-337U includes a 1/4"-20 female thread hex hole connected to a 1" rubber ball.
Powder Coated Marine Grade Aluminum
1" Rubber Ball "B" Size
The "U" in the part number reflects product packaged in poly bag.
|Ball and socket size||Product Type||Material||Packaging|
|B size 1" (Holds up to 2 lbs)||Holder||Powder Coated Marine Grade Aluminum||Packaged in Poly Bag|