This product is either discontinued or we cannot get that from suppliers.
Cisco Catalyst C6880-X-16P10G, Data Networking, Optical Network, Expansion Slots-16, Expansion Slot SFP+, Compatibility Cisco Catalyst 6880-X Series Extensible Fixed Aggregation Switch.
CISCO C6880-X-16P10G Cisco Catalyst 6880-x Multirateportcard (xl Tables).