Cleartex Ultimat Polycarbonate Chair Mat For Hard Floors, 48 X 60, ClearHigh clarity to allow the beauty of your flooring to shine through.Polycarbonate will not adversely affect polished or varnished wooden floors. Compatible with underfloor heating.Free of phthalates, tin, lead and cadmium content. WARNING: This product can expose you to Bisphenol A (BPA), which is known to the State of California to cause Birth Defect/Reproductive Harm. For more information go to www.P65Warnings.ca.gov. - Birth Defect/Reproductive Harm:Bisphenol A (BPA)