Ragmat Museum Solids Mat Board Crescent s 100 cotton RagMat Museum matboard is naturally acid free and lignin free and is time tested and the best for art preservation It features a solid color throughout the surface core and backing creating a beautiful gallery look that will protect your most valuable artwork 4 ply Includes . 10 Crescent RagMat Museum Solids Matboard Specifications . Color Neutral Gray. Size 32 x 40 in . Grade Level Not Specified. Selling UOM Case of 10. Certifications Not Applicable. Safety No Choking Hazard. Allergens Contains No Allergens. Material Rag Mat. Weight 10 lbs