Key Features Rewritable DVDRW 4. 7GB Native Capacity 4x Write Speed Package Type Spindle Matt Silver Disc Surface Verbatim\'s DVD-Rewritable (as well as CD-Rewritable) use a Super Eutectic Recording layer (SERL). SERL ensures that noise-free recording can be enjoyed time and time again. With conventional rewritable media, the recording layer deteriorates with every rewrite, meaning a decrease in quality. With Verbatim rewritable media however, the recording layer is returned to perfect condition on every erase cycle, leaving a flawless disc for the next recording.