This disc complies with BD-R Specification Version 1.2 For use only in drives or recorders that support 25GB Blu-ray Discs without cartridge. Product Number: 43742 Capacity: 25GB Speed: 6x Pack Style: 10 Pack Spindle Laser Wavelength: 205nm. Hard Coat protective layer. Extremely long archival life. Excellent playback performance. BD-R is for use in BD drives and recorders. Longer lifetime with Hard Coat Protection