Osprey's Steel Scope Rings (Mounts) are engineered for precision and exceptional durability. These rings are designed to provide increased torque, making them ideal for withstanding adverse conditions. With four size options available (Low, Medium, High, Extra High), users can choose the perfect fit for their needs. The height measurements are taken from the base of the mount to the top of the tube body, ensuring compatibility with 30mm scopes. They are backed by Osprey's industry leading no-nonsense lifetime warranty.Lifetime warranty; contact (470)274-5295 for warranty questions