Optrix Assorted Base Pack The Optrix Assorted Base Pack is a great choice for when you need to move your Optrix case from one place to another, without any hassles. The pack consists of 2 curved base mounts and 2 flat base mounts. This base pack was designed to make it so much easier to move your Optrix case from one mount to other. It can also be used for helmets and vehicles. These assorted base mounts help you keep your iPhone safely with you . The base pack is ultra durable and offers superior protection to your Optrix case and keeps it safe from any kind of external damage. With the Optrix Assorted Base Pack as a part of your gear, moving around is just so convenient and simple!