... substrate.Such as: (enamel,rubber,paints,plastics,copper,aluminum,zinc,tin,power,synthetic materials,Phosphide layer,Lead,tin,cadmium,ceramic ... plastic powder,synthetic materials,anodic-oxide layer on copper,aluminum,zinc,tin,non-magnetic stainless steel,gold and silver. Cover ... insulation not conduct electricity.All coating thickness gauges are FN type double function !Product Feature: (1)It meets the ...