ES Robbins 122183 Ever Life Anchor Bar Vinyl Chair Mat with Lip for Medium Pile Carpet, 45"x53", Crystal Edge GREENGUARD Certified for low chemical emissions to UL 2818 Protects medium pile carpets up to 3/4-Inch thick including padding All day support for everyday office use. Choose a higher pile chair mat if usage is over 8 hours or 200+ lbs. Anchor Bar chair mat cleat system holds securely, yet is gentle on carpet and fingers Made in the USA; Mfr. Limited Lifetime "No Crack Mat" Warranty