Ei Core Lamination for Power Transformer, Ballast Resistor, UPS, Charger, Control Transformer - China Lamination, Ei Lamination Core | Made-in-China.com
50-80W EI Transformer Core EI33 Isolator Inductor Ferrite Core with 6+6pin Bobbin MnZn PC40 Ferrite Chokes ,30sets/lot - AliExpress