The RAM Marine Grade Aluminum Mount consists of the 1" dia. ball and arm with RAM Plastic Cradle for the following: Motorola Small Mobile Phones This cradle has padded locking side clamps that close tightly on the item you want to hold. To release the clamp hold, simply press the button found at the bottom left side of the cradle which will spring the clamps open. At the base of the cradle are two small supports to hold the bottom of the item securely in the cradle. Cradle Dimensions (RAM-HOL-UN1U): Gripping Range (1.5" to 2.5") Overall Height (3.625") The "U" in the part number reflects product packaged in poly bag. For additional specifications, see components and drawings tabs. MATERIAL: Powder Coated Marine Grade Aluminum BALL SIZE: 1 Inch Rubber Ball COLOR: Black Powder Coat WEIGHT: 3.44 RETAIL: 39.38