If you need complete, clear double jewel cases for Cds/DVDs these work nicely. If you plan to interchange parts of these cases with other cases then look elsewhere. The back cover does not accomodate standard trays or other double-CD tray designs. Also, the front cover does not fit easily over standard rear covers (very snug, also has 2CD molded into top of cover). The parts of these cases are designed to work almost exclusively with each other so if you end up with extra they are essentially of no use for replacing standard case parts.