... mat has two layers.The facial layer is ESD layer;the other is conductive layer. 2-layer ESD Mat Antistatic SurfaceSurface Resistance106~109 ... Potential≤50V Bulk Resistance106-109ΩSpecification1 ESD layer resistance:107-109Ω.2,condutive layer resistance:103-106.Ω3,static electricity ... rubber mat has two layers.The facial layer is ESD layer;the other is conductive layer.Update date:20120911,09:36 2 ...