I only have some RWs, according to DVD Identifier -
Unique Disc Identifier : [DVD-RW:PRINCO]
Disc Type : [DVD-RW]
Manufacturer ID : [PRINCO]
Disc Application Code : [Unrestricted Use : Consumer Purpose]
Blank Disc Capacity : [2.298.496 Sectors - 4.489MB - 4,38GB]
[DVD Identifier - http://DVD.Identifier.CDfreaks.com]
Unfortunately they are crap, used once and get an error when trying to erase.