shenzhen circuit board production glass fiber custom double-sided multi-layer pcb processing fr-4 expedited proofing

processing custom: yes item no: 277 brand name: lingbang model: 277 mechanical rigidity: rigidity number of layers: double-sided base material: copper insulation material: organic resin insulation layer thickness: conventional board flame retardant properties :vo board processing technology: electrolytic foil reinforcement material: glass fiber cloth base.syi