3M Stikit Hand Block - Hand Sanding Block - Hard Density - For Adhesive Backed Sanding Sheets and Rolls - Yellow Sanding Block - 2.75" x 5" - 5440: Sanding Pads: Amazon.com: Industrial & Scientific
3M SandBlaster 9565 Large Between Coats Dual Angle Sanding Sponge, 2.5 in by 4.5 in by 1 in, 220-Grit, Clear - Sanding Blocks - Amazon.com