MAM-A (Mitsui) 8X Double Layer 8.5 GB White Inkjet Hub Printable DVD+R's 50-Pak in Cakebox MAM-A (Mitsui) 8X Double Layer 8.5 GB White Inkjet Hub Printable DVD+R's 50-Pak in Cakebox. The printable surface is perfectly suited for high-resolution color inkjet printing. No stacking ring or groove allows full-face, hub printing (unprintable clear center hub is 17mm wide). MAM-A (Mitsui) DVD+R DL discs burn up to 8X speed with compatible high speed DVD+R DL drives. 8.5 Gigabytes of storage capacity on a single-sided disc - No need to flip the disc!