SanDisk 128GB Extreme PRO CFexpress Card Type B - SDCFE-128G-GN4NN READ 1700 MB/S WRITE 1200MB/SSanDisk 128GB Extreme PRO CFexpress Card Type B SDCFE 128G GN4NN READ 1700 MB S WRITE 1200MB S Features Blazing Fast Speeds That Deliver Raw 4K Video When you're shooting where the action is, the CFexpress Card Type B unleashes the RAW performance of your gear. With read speeds up to 1700MB s and write speeds up to 1400MB s, you'll get low latency during high speed recording and an enhanced workflow efficiency that's far beyond anything existing