Mirlon is a flexible fiber sanding material which is easy to use on profiled surfaces. Synthetic fibrous mesh coated with resin and abrasive. Flexible. Easy to use on profiled surfaces. Aluminum oxide - very fine (VF) maroon. Silicon carbide - ultra fine (UF) gray. 6" x 9" Pad or 4" x 10 yard roll. Phenolic resin bonding. Can also be used wet. Cut to length 4" roll or 6" x 9" pads. Color: Grey. Grit: 1500.