... 64MB, 128MB, 256MB, 512MB,1GB,2GB and so on Silicone USB Memory1.Material:100%silicone 2.Capacities: 64MB, 128MB, 256MB, 512MB,1GB,2GB ... and so on Silicone USB Memory1.Material--100% silicone ,flexible,nontoxic and non-stick.2. Quality--ISO standard ... ,SGS ,Rohs passed.3.Use--can protect your usb flash ...