... of experience in PCB industry UL,SGS,ISO9001,RoHS,QS9000,TS16949 Layer:1~22 layersMaterials: FR-4, CEM-3, Teflon, Aluminum, ... "±0.075mm Layer to Layer ±0.0024"±0.060mm Copper Feature to Holes(Outer) ±0.003"±0.075mm Min ... . Plated Drills to Copper (inner)2L - 8L0.010"0.25mm 10L -22L0. ... to Edge Tolerance ±0.004"±0.100mm Min. Copper to Edge distanceOuter0.010"0.25mm Inner0.016"0. ...