Sandpaper Roll, Abrasive Type Coated, Abrasive Material Ceramic, Attachment Type Hook-and-Loop, Backing Material Paper, Backing Weight C, Coating Coverage Closed, Color Blue, Grit 500, Series 321U, Overall Length 39 ft, Overall Width 2 3/4 in, Resistance Properties Debris, Dust, Product Type Sandpaper Roll, Vacuum Holes Multi-Hole