Includes RAM Stubby cup holder ball base, medium length B size RAM double socket arm, and large RAM X-Grip phone holder Spring-loaded 'X' design for large phones with rubber caps sports great holding power without hiding your phone; includes optional device tether for peace of mind during rugged use Compatible with any vehicle cup holder with an inside diameter range of 2.57" to 3.5" Made of powder-coated, marine-grade aluminum, stainless steel, and high-strength composite for durability and reliability in the most demanding environments Backed by a lifetime warranty