Thetopplateandwallplatearemadeoflight-transmittingpolypropyleneplasticmaterialtominimizetheamountofpowderadhesionandpreventtheaccumulationofstaticchargesfrominterferingwiththeelectrostaticfield.Thebottomplateandbasearemadeofstainlesssteel, whichiseasytocchanicalhastufficu.
