The RAM-247U-4 is a clamp base with 1.5" rubber ball that will connect to rails up to 4" maximum in width.
Powder Coated Marine Grade Aluminum
1.5" Rubber Ball Size
The "U" in the part number reflects product packaged in poly bag.
|Ball and socket size||Product Type||Material||Vehicle||Mount function||Packaging|
|C size 1.5" (Holds up to 4 lbs)||Base||Powder Coated Marine Grade Aluminum||Forklift/Lift Truck||Flat Edge Clamp||Retail Packaging|