RAM 2.5" x 2.5" Square Aluminum Base Plate with 1" Ball

Features: 2.5" x 2.5" plate with a four hole pattern - center to center hole pattern is 2" x 2" (hole diameter: 1/4")* Plate thickness: 1/4":  constructed of powder coated marine grade aluminum 1" rubber ball fits RAM B Size compatible socket arms Holds up to 2 lbs. with standard use or 1 lb. with heavy-duty use Manufacturer lifetime warranty Made in the USA   * Mounting hardware not included   Brand: RAM Mounts Part number: RAM-B-202U-2525 Warranty: Manufacturer's lifetime warranty