Ram Mount 1-Inch Diameter Ball Mount with Diamond Base and Universal X-Grip Cell/iPhone Holder - Non-Retail Packaging - Black Holder Dimensions: Minimum Width = 1.875", Maximum Width = 3.25", Depth = 0.875" Spring loaded holder expands and contracts for perfect fit of your device High strength composite and stainless steel construction Rubber coated tips will hold device firm and stable Socket technology allows for multiple adjustment angles and articulation of device