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Providing with quality and standard customer-made electronic and passive components DR Drum core and solution products, Fullstar Electronics is a leading DR Drum core manufacturer and supplier in China. Welcome to wholesale electronics DR Drum core, Ni-Zn Ferrite Cores, Mn-Zn Ferrite Cores, toroidal ferrite cores, toroidal transformer cores, toroidal magnetic cores, round ferrite cores from our factory.