We are the specializing factory of EI LAMINATION、SILICON CORE、LAMINATION CORE、TRANSFORMER CORE、STAMPING CORE、MOTOR LAMINATION、SILICON STEEL COIL in Jiangyin,Jiangsu China. ONE PHASE EI SILICON STEEL SHEET. WHAT IS ONE PHASE EI CORE LAMINATION? One phase EI silicon steel sheet without holes or with 4 holes, which is to produce one phase EI transformers. The main size is from EI28-EI300 in our factory. Grade of raw material: 0.5 mm , W800, W600, W470, W400 etc.