mulitlayers pcb

{"cid":"91197854","title":"0.5mm FR4 PCB Board Thin Circuit Board For GPS Tracker","imgUrl":"https:\/\/img.chinax.com\/nimg\/d4\/84\/a1368c15c12ba76072f56d9236d7-200x200-1.jpg","attrs":{"Price":"USD9.99-99.99","Brand Name":"Bicheng","Model Number":"BIC-495.V1.0","Minimum Order Quantity":"1PCS","Delivery Time":"8-9 working days","Certification":"UL, ISO9001, IATF16949","Place of Origin":"CHINA","Payment Terms":"T\/T","Supply Ability":"5000PCS per month","Packaging Details":"Vacuum bags+Cartons","Base material":"FR-4","Layer count":"4 Layers","PCB thickness":"0.52-0.56mm","PCB size":"100 x 105mm=72PCS","Solder mask":"Green","Silkscreen":"N\/A","Copper weight":"Outer layer 35 um\/ Inner layer 18 um","Surface finish":"Immersion gold"}}