fr-4 single side, double side, four layer pcb proofing, expeditated circuit board proofing, circuit board mass production

processing custom: yes item no: 017 brand name: lingbang model: 017 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 insulation resin: epoxy resin (ep) product nature:seller marketing method: factory direct selling.syi