... ) Green, blue, gray (shiny ,dul). 3) Excellent ESD Performance. Two Layers Glossy or Dull ESD Mat Feature:1) Entirely free of carbon ... *2mm(T)colourblue, green, gray, black Antistatic layer (green layer, sponge layer)Surface resistance106-109ΩFriction static potential V<100VConductive layer ... 10S)Volume resistance107-1010Ωcm Two Layers Glossy or Dull ESD Mat green/blue/grey