... available. Specification of usb 3.0:Capacities1GB,2GB, 4GB, 8GB, 16GB, 32GB, 64GBInterface typeUSB2.0/3.0MaterialMetalSpeedWriting speed :3-10M/s .reading ... keyring (optional)Data retention10 years Product Show of usb 3.0:Packaging & ShippingOur Services1. Each USB can be customized ... approve ,we will arrange a sample production ,the next is sample picture or sending sample to you for confirmation , ...