Size:40-Disc Spindle FFP Verbatim BD-R LTH media is manufactured with an organic dye that turns the disc's reflectivity during recording from 'low to high'. Other BD-R discs use the 'high to low' recording method. Additionally, BD-R LTH is manufactured on converted CD-R/DVD-R production lines, which utilize a spin coating process and allow excess materials to be recycled. These two cost-cutting measures let us pass along the savings to you. Upon introduction of the BD-R LTH media, key hardware manufacturers like Sony, Pioneer, Panasonic and LG have worked to assure that their burners are fully compatible. If your BD burner is a 2009 model or later it will most likely support recording and playback of BD-R LTH media. If your Blu-ray hardware was manufactured before 2009, check with the manufacturer for firmware updates. All Verbatim Blu-ray discs are backed with a Limited Lifetime Warranty and a 40-year history of quality and reliability.