... is ESD layer;the other is conductive layer. durable ESD table mat Antistatic SurfaceSurface Resistance106~109ΩSizeThicknessAbrasive Static Potential≤100V0.6m ... :2mm,3mm.8,width::600mm,900mm,1000mm,1200mm,1600mm,1800mm.9,length:10mm,20mm.Note:ESD rubber mat has two layers ... is conductive layer.Update date:20120908,09:36 durable ESD table mat