Osprey’s Steel Scope Rings (mounts) are precise and extra durable. They allow for more torque when durability from adverse conditions is absolutely necessary. With 4 sizes to choose from (Low, Med, High, Extra High) you are bound to find the one that works for you. The height measurements are measured from the base of the mount to the top of the tube body. These scope ring mounts are compatible with 30mm scopes. They are backed by Osprey’s industry leading no-nonsense lifetime warranty.