3M™ Flexible Foam Sanding Sponge, 4-1/2 in x 5-1/2 in x 3/16 in MED, 250 per Case Bulk | 3M Indonesia
Amazon.com: ADVcer 500-2000 Grit Sanding Sponge 8 Pads, 4.5" x 5.5" x 0.2" Assorted Wet or Dry Ultra Fine Hand Sanding Sponges, Flexible Soft Foam Sand Block for Drywall, Corner Contour, Metal