Come and see our amazing products. The climbing keychain USB U disk uses metal material. Here is a USB flash drive with 4GB of RAM. In addition, we also provide 8GB, 16GB, 32GB and other larger memory U disks, the price is different, please contact us for an accurate quote. We welcome customized logos, please contact us. Pls confirm with us about the packing info, stock color and exact production time before placing your order.