ES Robbins Chair Mat for Flat/Low Pile Carpet, 36" x 48" w/Lip, Clear Office Chair Mat | High quality mat prevents carpet from wear and tear Protects flat to low-pile carpets up to 1/4" thick including padding | Ideal for home and light office use (usage less than 8 Hours or 200 lbs) AnchorBar chairmat cleat system holds securely, yet are gentle on carpet and fingers Straight edge | Clear 36" x 48" Mat size | 10" x 20" Lip size | Each