Verbatim BD-R LTH Type 25GB 6X with Branded Surface, 50 Pack Spindle 43773 Low to High (LTH) - BD-R LTH is the same as all other Blu-ray media, except it's manufactured using a more efficient production process. High-Definition - Blu-ray discs are designed especially to store large HD video and audio files. So, you'll use fewer discs when you're backing-up, recording or duplicating high definition digital recordings - including your music library. Hard Coat - All Verbatim Blu-ray discs are treated with a super hard coat to prevent scratches, resist fingerprints and reduce dust build-up. Laser Technology - Verbatim Blu-ray discs use blue-violet laser technology to read and write data. That means, superb resolution, excellent contrast, vivid colors and amazing sound. Capacity - The Verbatim single-layer Blu-ray disc offers up to 25GB of storage space to back-up your video, music, photos and more.