This product was developed specifically for conservation quality framing. ArtCare Archival Foam Board delivers two-sided ArtCare protection that out performs all other foam boards actively protecting mounted artwork from damaging pollutants and harmful gasses. Great for back boards, exhibits, displays and models. Cuts easily. Lightweight and sturdy these boards are made from CFC-free extruded polystyrene sheets sandwiched by ArtCare paper. Packaged five (0.1875'' thick) sheets per package. No broken packages. Price per package of 5 sheets