Ridata 52X 80-Min Silver Inkjet Hub/Silver CD-R's 50-Pack Shrinkwrap 52X 80-Min Silver Inkjet Hub/Silver CD-R's. Record surface is lite-green. Ridata, a pro-grade media manufacturer, offers media certified for the highest recording speeds. An excellent combination of price, quality & consistency. Ridata (made in Taiwan) CD-R's. Silver Inkjet Hub Printable Surface. No stacking ring or groove allows full-face, hub printing!