... range of spec 3) Applicable to all kinds of transformer core EI Lamination Features:1)Specification: From EI-28 to EI-240 ... ;0.30mm;0.35mm;0.5mm4)Raw materials ( CRNGO or CRGO):a) Bao steel: B50A1000, B0A1300, B50AH470, B50AH600, B50AH800, B35A270,B35A300b ... of iron cores for power transformers EI-120 Silicon Steel Lamination