Porter Sanding Belt 714410502 Porter Cable 4" x 24" ™ Premium Sanding Belt - 50 Grit 2 Pack Features: Premium zirconium grain is sharper, more durable and cuts cooler than standard aluminum oxide Bi-directional flush joint runs smoothly in both directions Made with heavy-duty, X-eight cloth to resist tearing and stretching Double resin system resists heat and humidity for longer life Application: Cuts faster on wood; lasts longer when grinding metal, fiberglass, plastic and other hard surfaces Fits: Portable belt sanders Size: 4" x 24" Grit: 50 Quantity: 2