3M 7100170037 | Pro Grade Precision 1" Thickness x 4-1/2" Width x 2-1/2" OAL Extra Fine Grade 180 Grit Sanding Block Sponge - All Industrial Tool Supply
Block-Sanding Basics - 125 Steps To Perfect Paint
Finish 1st
3M SandBlaster Pro 320-Grit Sanding Sponge 2.5-in x 4.5-in in the Sanding Blocks & Sponges department at Lowes.com