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34477 black fr4 pcb products are offered for sale by suppliers on Alibaba.com, of which pcba accounts for 45%, other pcb & pcba accounts for 29%, and multilayer pcb accounts for 10%. A wide variety of black fr4 pcb options are available to you, such as factory, odm and oem/odm.You can also choose from electronic device, communication and oem electronic black fr4 pcb,As well as from hasl, hasl lead free black fr4 pcb,