The SanDisk PRO-CINEMA CFexpress memory cards provide professional filmmakers with the necessary sustained minimum write speed to deliver footage in the highest cinema quality. With flawless 8K recordings, extremely fast burst speeds, and exceptional durability, you will shine on any set. Designed for professional use with cinema cameras featuring CFexpress technology. Flawless 8K video recordings with a lightning-fast sustained write speed of at least 1,400 MB/s. Extremely fast burst speeds of up to 1,500 MB/s for writing and 1,700 MB/s for reading. Maximum transfer speed with the SanDisk Professional PRO-READER CFexpress Type B.