If you are planning to import impedance pcb,Website:http://www.ljpcb.com, Longjiang Circuit International Limited is one of the leading impedance pcb manufacturers and suppliers, welcome to contact with our factory.Type: impedance pcbfinal board thickness: 2.0mmfinal copper thickness: 70umsolder mask colour: greenMin. line width/space: 0.125mm/0.125mmmin diameter of finished hole: 0.3mmsurface finish: immersion gold