2set ER3310 33mm 10mm 5mm 5+5pins Ferrite Cores and bobbin, transformer core, inductor coil
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We use the Polyethylene foamed sheet to protect the ferrite cores and bobbins, then use the air column, don't worry!
ER3310 5+5pins Ferrite Cores
each set =2 ferrite halves + 1 bobbin