3M SPONGE SHEETS SOFTBACK 4-1/2""X5-1/2"" U-FINE 20/BX

Features and Benefits:

• Ultrafine grade 800-1000
• Provide flexibility and conformability to allow for sanding by hand in areas inaccessible to machine sanders
• Use wet or dry when sanding on wood fiberglass/gelcoat; marine paints; metals and plastics
• Abrasive Mineral type: Aluminum Oxide