バーベイタム BD-RE 25GB 50枚+3枚

It looks like you're referring to a specific product: the Verbatim BD-RE (Blu-ray Disc Rewritable) 25GB, which is sold in a package of 50 discs plus 3 additional discs. Verbatim is known for producing high-quality recordable media, including Blu-ray discs, DVDs, and CDs.
BD-RE discs are designed for rewritable use, meaning you can write data, erase it, and rewrite new data multiple times. They are commonly used for high-definition video recording, large data storage, and backup purposes.
If you need more specific information about this product, such as its features, usage, or comparisons to other media types, feel free to ask!