Used DVD-RW discs. There are 40 discs. These discs have been initialized. There is writing on the disc surfaces with a marker. Since there may be some defective discs, I will include two extra discs for a total of 42. The disc designs vary, so they are not all the same as the images. - Type: DVD-RW - Capacity: 120 minutes (approx. 4.7GB) - Speed: 1-2x Thank you for looking.