... (punch)Board thickness less than 1.0mm for FR-4,CEM-3:0.8mm*0.8mm(31.5mil*31.5mil)Board thickness1 ... .2-3.0mm(47mil-120mil) for FR-4,CEM-3(47mil-120mil):1.0mm*1.0mm(40mil ... )TypeDouble layer,multilayer,aluminum,ceramic,PTFEMaterialFr-4,CEM-1,CEM-3,High frequency boardProcessing thickness0.2mm-3.5mmbase copper thickness18um,35um,70umMin hole diameter ...