Our phasetwo inventory racks are engineered for high-capacity, lightweight storage of cryo boxes. Our racks are constructed of 1mm thick anodized aluminum and come with a LIFETIME WARRANTY. Now you can get the strength of a stainless-steel rack with all of the benefits of aluminum (lightweight and good thermal conductivity). All of our racks include an easy to grab handle, and customizable and interchangeable colored ID labels. We also incorporate stainless steel spring clips on every shelf to hold your boxes in place without the need for that aggravating locking rod you find on so many freezer racks.