Deflecto EconoMat Black Chair Mat, Low Pile Carpet Use, Rectangle, Straight Edge, 46 x 60 Inches (CM11442FBLKCOM) Protective black vinyl chairmat prevents wear and tear on your chair and extends carpet life Suitable for occasional light daily use, up to 4 hours per day, over commercial carpeting up to 1/4" thick Studded bottom surface provides superior, non-skidding gripping power over carpet Straight edge enables easy carpet to chair mat transition at home, office or any commercial environment Free and Clear non-phthalate, non-cadmium material formula promotes a healthy work environment, while offering exceptional quality and durability