Check the listing for details. MEM2800-256CF 256MB Compact Flash Cisco 2811 2821 2851. Condition: New. Listed at 16.99 USD. MEM2800-256CF 256MB Compact Flash Memory for Cisco 2800 Series Router. Also known as: MEM2800-64U256CF Compatible with: Cisco Router 2811 2821 2851 Third Party. Guaranteed compatible. Warranty: Lifetime Replacement Warranty.Support: Email us through eBay Premium Quality: Brand name parts only-no unknown and overclocked parts. All memory modules made from major brand memory chips such as Micron, Samsung, Elpida, Hynix, Promos, Infineon/Qimonda. We do not use generic or OEM chips that are unreliable. Compatibility: Industry standard memory. Guaranteed 100% compatible. Experience: Memory expert since 1990. Exchanges and Returns: No hassle exchanges and refunds. Shipping: Quick shipping. Shipped in well padded envelope or box with antistatic packing.