SONY 700MB CD-R, pack of 10, supports up to 48x write speed. - Brand: SONY - Model: CD-R - Capacity: 700MB - Quantity: 10 - Write Speed: 1x-48x Thank you for viewing. I don't know when or where I bought these; they came up while I was tidying up, so I'm putting them up for sale. Since the product is unopened, I cannot be responsible for initial defects; please contact the manufacturer. Thank you for your understanding.