CRO NR46 CHA -- 4x6 Charcoal Needle-Rib™ Indoor Wiper/Scraper Mats Rugged grooves and ribbed needle punch polypropylene fibers help remove dirt and moisture from shoes. Wear-resistant, colorfast design for light to medium traffic areas. Product contains 9% total recovered material. Surface: 50% recycled content. Contributes to LEED Certification. Backing: Vinyl with natural organic resin blend. Manufacturerfs limited one-year warranty. Overall thickness 5/16 -in. Sold by the Each.