This lot of 11 7/8" Staples ARC Expansion Discs Black Discbound Notebook Rings are high-quality office supplies designed for creating organized and well-structured notes. The discs are compatible with black discbound notebooks, making it easy to keep your pages securely bound together. With the trusted brand of Staples, you can rely on these discs to provide a secure and durable method for organizing your notes and ideas. These expansion discs are a must-have for any office or school setting looking to improve productivity and organization.