The product is a pack of 18 black plastic coil binding spines with a 50mm length and 4:1 pitch, providing 48 loops for binding. These spines are designed for use in office and industrial settings, specifically for filing, storage, and binding documents. The plastic coil design offers a secure and durable binding solution for various paper and document types. Ideal for businesses and individuals looking for a reliable and efficient way to organize and store important documents.