Antifatigue Mat, Mat Shape Rectangle, Black with Yellow Border, Width 3 ft, Length 4 ft, Thickness 5/8 in, Mat Surface Pattern Corrugated, Mat Surface Material Vinyl, Mat Backing Material Closed Cell Vinyl Foam, Weight 11 lb, Edges Beveled, Standards ASTM C1028-96, ASTM D2240-02, CPSC-FF-1-70, ASTM D-2859, ASTM D1004-94A-03, ASTM D412, ASTM D3884-01, Mat Electrical Resistance Electrical Properties Not Tested, Not Flame Resistant or Fire Retardant, Antimicrobial No, Brake Fluid Resistant No