Office Marshal PVC Office Chair Mat for Hard Floors (30" x 48") | Clear Vinyl, Rectangular, Floor Protection Clear PVC vinyl chair mat for hard floor (30" x 48") | Transparent: allowing the aesthetic of your floor to show through Designed to prevent against wear and tear caused by office chair casters | Multipurpose solution: ideal for general floor protection Allows your office chair to move freely while carrying out daily tasks, helping considerably reduce stress and leg fatigue To avoid damage to floors, these mats are free from chemical adhesives Certified by TV Rheinland (a global provider of technical, safety, and certification services throughout the world)