The product is a pack of 1000 AmazonBasics 10 Security Tinted Business Envelopes, measuring 4.12×9.5 inches. These envelopes are specifically designed for business use and come with a security tint for added privacy. The product is listed under the model number AMZSEC10, indicating a specific design or product line within the AmazonBasics brand. Ideal for sending confidential documents or sensitive information securely, these envelopes provide a reliable and discreet option for business correspondence.