Unmounted Flap Wheels | Abrasive Type: Non-Woven | Outside Diameter (Inch): 4 | Face Width (Inch): 4 | Center Hole Size (Inch): 4 | Abrasive Material: Aluminum Oxide | Grade: Coarse Back to top Product Specifications Abrasive Type Non-Woven Outside Diameter (Inch) 4 Face Width (Inch) 4 Center Hole Size (Inch) 4 Abrasive Material Aluminum Oxide Grade Coarse Grit 180 Interleaf (Yes/No) No