These 25 CD-R blanks from Verbatim can be used to make backup copies of data or audio CDs, or to produce your own data or audio CDs. These blanks are designed for over-length writing at a write speed of up to 52x. They are not rewritable and offer a maximum capacity of 700 MB (equivalent to 80 minutes of audio),... which must be written in one pass (Disk-At-Once) or in stages (Track-At-Once).