Material: Metal.
Write speed: USB flash drive write speed is 5M/S — 10M/S or you will lucky to get 11M+.
About Capacity:
Flash memory vendors are using decimal arithmetic:1MB= 1000KB,1G=1000MB calculated, the operating system using binary arithmetic:1MB= 1024KB,1GB= 1024MB;so there are some differences between display capacity and nominal capacity of flash memory product.

8G is about 7.2G ;
16G is about 14.4G ;
32G is about 28.8G;
64GB is about 57.5G

Feature:
Made with metal,comprehensive protection,iron and steel quality.
Waterproof,dustproof,anti-static,anti-magnetic,high temperature.
Design with a key hanging buckle,easy to carry.
Transmission speed up to 5-10M/s

Package content:
1 * 8GB USB 2.0 Flash Drive
All metal casing,comprehensive protection,iron and steel quality.
Transmission speed up to 5-10M/s
100% seal design waterproof,dustproof,anti-static,anti-magnetic,high temperature.
The great ring design,product can be fastened with leather bags,easy to carry.
Capacity:8GB