Hp T5740 Thin Client Az551aa PCI Express Expansion Module Chassis - 581264-002 HP T5740 Thin Client AZ551AA PCI Express Expansion Module Chassis - 581264-002 Features :Product Type Riser Card.Manufacturer Part Number AZ551AA.Manufacturer Website Address hp Manufacturer Hewlett-Packard.Product Model AZ551AA.Product Name PCI Express Expansion Module Expansion Slots PCI Express x4 32-bit. Compatibility HP t5740 Thin Client HP t5745 Thin Client.##SORRY, NO INTERNATIONAL SHIPPING. US 48 CONTINENTAL STATES ONLY.