Bertech ESD Three Layer Vinyl Mat Roll, 2' Wide x 10' Long x 0.093" Thick, Blue (Made in USA) Made in USA RoHS Compliant Surface Resistivity: 3.0 x 10^7 - 9.5 x 10^8 ohms/sq. Made of homogeneous solid vinyl mat with buried conductive layer in between (Three Layer Mat) Highest quality mat and the best at maintaining an ESD Safe environment