Heavy Duty Vented/Aerated Single Lip Chair Mat 127000SLRV With Beveled Edges And Rounded Corners, (Size 36" x 48" with 20" x 12" Lip) Heavy Duty 36" x 48" single lip chair mat designed to reduce the occurrence of Moisture and Mold High performance chair mat with Hundreds of Tiny Holes, Beveled Edges and Rounded Corners Protects all carpets; essential for extra-high pile carpets more than 1- Inch thick including pad Exclusive Anchor Bar cleats hold firmly in place yet are gentle on carpet and fingers GREENGUARD Indoor Air Quality Certified