3M 39367, Pro Grade Precision Dust Channeling Block Sanding Sponge 180 grit Fine, 2503TRI-180-CH, 4.5 in x 2.5 in x 1 in, 7010410822 » Alloy Coating Supply®
Amazon.com: BOSHCRFAT 10 Pack Sanding Block, Washable and Reusable Sanding Sponge for Wood Drywall Metal Glasses Coarse/Medium/Fine/Superfine in 60/80/100/120/180/220 Grit Sandpaper Block Sand Paper Brick : Tools & Home Improvement
3M Pro Grade Precision 2-1/2 in. x 4-1/2 in. x 1 in. 180-Grit X-Fine Block Sanding Sponge 24002PGP-XF-B - The Home Depot
Diablo DFBBLOCUFN01G ENDURA-BOND Flat Edge Sanding Block, 4 in L, 2-1/2 in W, 180 Grit, Ultra Fine
3M Pro Grade Precision 2-1/2 in. x 4-1/2 in. x 1 in. 180-Grit X-Fine Block Sanding Sponge 24002PGP-XF-2 - The Home Depot
3M Pro Grade Precision 2-1/2 in. x 4-1/2 in. x 1 in. 180-Grit X-Fine Block Sanding Sponge 24002PGP-XF-B - The Home Depot
Dixon Sanding-Block Fine 180-Grit Detail Sandpaper 3.875-in W x 4.75-in L 250-Pack at Lowes.com