Sold as 1 Each. Economical, protective vinyl chair mat prevents wear and tear and extends carpet life. Straight edge. For occasional office use on carpets up to 1/4' thick, Low Pile/Commercial Grade. Choose a higher pile chair mat if daily usage is over 4 hours. Studded bottom surface for superior gripping power on carpets. Easy-glide rolling surface provides effortless chair movement. Free and Clear non-phthalate, non-cadmium formula promotes a healthy work environment while offering exceptional clarity and durability.