Ram Mount RAM-B-101U 1-Inch Diameter Ball Mount with 2/2.5-Inch Round Base (Black) Consists of a double socket arm and two 2.5" diameter round bases that contain the universal AMPS hole pattern Allowing for almost infinite adjustment and perfect viewing angles The included RAMs patented design dampens shock and vibration, helping to extend the life of your device Overall Height: 5" Powder Coated Marine Grade Aluminum Powder coated marine grade aluminum Dampens shock and vibration Infinite adjustment and perfect viewing angles Supports up to three pounds