3M 415N Stikit Trim-M-ite paper are used for a variety of applications where fine finishing characteristics are needed. Features silicon carbide mineral coated on an A wt. paper and have a Free-Cut coating to resist loading. The 5" rolls of 150 A grit are 250 discs per roll. These are part of a woodworking shop purchase, all in original plastic bags and boxes. 3M makes great paper so I'm confident you'll be happy with your purchase.