Highlights: Material : Ceramic Alumina Size : 5" Grit : 320 Grit Style : 5 and 8 Hole UVH Attachment Style : Hook and Loop Grade : Extra Fine 5 and 8 inch Universal Vacuum Hole P-graded seeded-gel ceramic alumina abrasive for fastest cut rate and longest life of any paper disc Unique fiber reinforced, flexible B-weight latex saturated backing delivers 50% - 60% improvement in tear strength while retaining flexibility Water-based, non-pigmented stearate No-Fil coating, open coat and vacuum holes maximize load resistance and dust extraction with no color transfer to work Number in Package : 50 While we aim to supply accurate product information, it is sourced by manufacturers, suppliers and marketplace sellers, and has not been provided by Overstock.