Designed to withstand the rigors of high performance photography and videography, the 256GB Steel CFexpress Memory Card from Hoodman provides a storage capacity of 256GB and uses the PCIe 3.0 bus to deliver read speeds of up to 1700 MB/s and write speeds of up to 1400 MB/s for your CFexpress-compatible cameras. This card has also been ruggedized for enhanced durability and can withstand temperatures ranging from -13 to 185°F.