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1597 single layer fr4 pcb products are offered for sale by suppliers on Alibaba.com, of which pcba accounts for 27%, multilayer pcb accounts for 13%, and double-sided pcb accounts for 2%. A wide variety of single layer 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 single layer fr4 pcb,As well as from hasl, hasl lead free single layer fr4 pcb,