Iridium 6" Grip Sanding Discs, Mirka 24-6Mh-400, 121H 400G (50 Discs/Box). Mirka 24-6MH-400 Iridium 6" Grip 89H 400G (50 discs/box) Iridium is produced with cutting edge technology and perfected for speed and efficiency. From coarse to fine grits, Iridium cuts faster with fewer steps on both soft and hard surfaces. Thanks to the new precision coating, the abrasive does not wear out easily. It practically repels dust, so the grains stay sharp longer. Dust extraction is efficient and convenient with Mirka?s new multi-hole pattern. Just place and go. Key Features Fast sanding and consistent scratch pattern saves you time and money Consistent quality and non-stick coating repels dust and provides a long disc life Effective multi-hole pattern delivers outstanding performance without clogging Premium paper backing offers remarkable flexibility and grain adhesion Applications Automotive Refinishing Wood Finishing Composites Finishing Vehicle Manufacturing Specifications Grain: Ceramic / Aluminum oxide Color: Gray Backing: Latex C-paper Bonding: Low VOC resin system Coating: Semi-open Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm. Fast sanding and consistent scratch pattern saves you time and money Consistent quality and non-stick coating repels dust and provides a long disc life Effective multi-hole pattern delivers outstanding performance without clogging Premium paper backing offers remarkable flexibility and grain adhesion