The product is a lot of 20 mixed compact flash cards with a capacity of 256MB, specifically designed for use with Cisco routers such as 1900, 2900, and 3900 ISR. These memory cards are compatible with Cisco routers and provide additional memory for increased performance and functionality. The compact flash form factor makes them easy to install and use, providing a reliable and efficient solution for enhancing your network capabilities. Perfect for businesses looking to optimize their enterprise networking setups.