RAM Mounts Vibe Quick-Grip XL Phone Holder With Stem And Vibe Safe Adapter The RAM Quick-Grip Phone Mount with Vibe-Safe and Fork Stem Base is designed to protect your phone from vibrations by integrating the Quick-Grip Mount and Vibe-Safe damping technology. It includes a pre-assembled tether for outdoor use, a short B-size arm, and a RAM Motorcycle Fork Stem Ball Base. Ensure your device fits the required dimensions, including any case or skin you may use. Features: RAM Vibe-Safe dampens a wide range of vibration frequencies Designed to fit into the cylindrical bore wall of 12mm - 38mm (.5 - 1.49) fork stem holes Made of high-strength composite and stainless steel hardware for durability and reliability in the most demanding environments Unique structure and thoughtfully designed with all industries in mind Backed by a lifetime warranty Holder Dimensions: Height Range: 5.75 - 8.25 Width Range: 2.625 - 3.625 Max Depth: 0.72