ProDisc DVD Duplicator Version DVD-R was certified from the Pioneer Class A Lab. Recognition from the Pioneer Class A Lab requires passing more than 100 strict inspections on the product as well as the manufacturing processes. Top layer of ProDisc DVD Duplicator Version blank media has been specially processed. A layer of clear code is added so that ProDisc DVD-R has better perfomance on thermal printers than regular DVD-R. Besides, it is finger print free. Most of ProDisc DVD Duplicator Version printable DVD-R discs have no stocking ring. That means you can print all the way to the center hub of the disc and personalize your DVD in a more stylish and unique way!