That same year (1961), IBM also tried another format for its storage units. The 1301 was used with IBM’s 7000 Series mainframe computers. It stored 28 million characters on a single module, each with 20 large disks and 40 recording surfaces. They were sold in various capacities: Model 1 came with one module, Model 2 came with 2, etc. One thing that made the 1301 very different from the 1405 was that a separate arm and head was used for each recording surface. This was a time-saving innovation because previously a single arm and head moved between each area and disk. These multiple heads were designed to move through air aerodynamically, which also cut back on access time. The Model 1 version of the 1301 could be purchased for $115,000.