... in higher quality, more competitive price, quicker delivery and better logistic service…Welcome to send us RFQ! ... for your reference, for more messages, pls contact with us freely!ItemSpecification MaterialFR-4 / Hi-Tg FR- ... 105um),+/-8um(tolerance),purity 99.5%Impedance Control±10%Bow and Twist MAX.0.75%(SMT)Anti-strip ... ,UL, Welcome to visit WALBOND ! loudspeake and radiator PCB with UL standard