3M Disposable Paper Mixing Board. A fail-safe filler prep surface. Completely free of impurities commonly found in materials like cardboard. Clean, non-porous surface won't contaminate body filler. Made of non-soak paper so filler will not soak through to floors, benches or equipment. Sized for multiple mixes on one sheet. 10" x 13" sheets. 100 sheets per board. White.