Peak Design Mobile Locking Ball Mount AdapterUpdate your third-party phone mount with Peak Design's robust, low-profile, user-friendly SlimLink connection system. It is compatible with a range of modular third-party phone mounting systems; in particular, it is compatible with those that use ball-and-socket joints with a diameter of 1" or 20mm. With its amazingly quick and secure phone mounting action, the Peak Design Ball Mount Adapters enhance your system. Additionally, they are made of weatherproof machined and anodized aluminum, making them perfect for all of your outdoor activities with the Locking Ball Mount. Available in charging and locking mount styles.Features: Compatible with third party phone mounts Machined/anodized aluminum mounting head Machined/anodized ball (20mm models) EPDM rubber ball/arm with solid aluminum core (1" models) Grippy silicone mounting pad with Tinuvin 770 UV-stabilizer Silicone vibration dampers High-temp neodymium mounting magnets Built-in SlimLink connection system is ultra secure and feels like magic Requires a Peak Design Case or Universal Adapter (sold separately). Note: Requires a 3rd party phone mount that utilizes 1" (like RAM) or 20mm (like Offroam, Tackform, 67 Designs) ball-and-socket connection joints (sold separately).