This is a brand new, sealed package containing four Avago AFBR-79EEPZ-NA1 21 XFR CLASS 1 40G QSFP modules. These modules are perfect for use in enterprise networking, servers, and switches. They are made by Avago, a trusted brand in the industry known for their high-quality products.These modules are compatible with computers, tablets, and other devices that require high-speed networking. With their advanced features and reliable performance, they are sure to be a valuable addition to any networking setup. Don't miss out on the opportunity to enhance your network with these top-of-the-line modules.