Ridata Double Layer 8.5GB DVD+R 2.4X Inkjet Printable in 25-Piece Cakebox (Discontinued by Manufacturer) Capacity: 8.5GB, Speed: 2.4X, Disc Top Surface: White Inkjet Printable Largest compatible DVD back-up and data archiving format for computer drives 4 hours DVD quality video or 16 hours VHS quality video Writes dummy data in remaining data area