DESC: Lexar Media's Professional CompactFlash Memory Cards are ideal for any photographer who demands optimal performance from both the memory card and Digital SLR camera they use. Our 133X read & write speeds are designed to speed up image capture times by taking advantage of a Digital SLR camera's high-speed processor. Capable of sustained write speeds of 20 MB per second, making our 133X CompactFlash a top choice among professional photographers.