3M 99439NA Pro-Pak Drywall Sanding Screen 180 Grit, 10/pk

3M 99439NA 4-3/16" x 11" Pro-Pak Ultra Fine Grit Drywall Sanding Screens 10 Count (10 Pack)3M is a diversified technology company serving customers and communities with innovative products and services. 3M is committed to actively contributing to sustainable development through environmental protection, social responsibility and economic progress.3M 99439NA 4-3/16" x 11" Pro-Pak Ultra Fine Grit Drywall Sanding Screens 10 Count (10 Pack) Features: Waterproof and can be rinsed for reuse Designed for sanding drywall joints, patching compounds and plaster Made with sharp silicon carbide mineral for long-lasting performance 4-3/16" x 11-1/4" screen 10 per card 99439NA: 180A grit, ultra fine 99440NA: 100A grit, medium