... ISO14001 4. Resonable price , High quality EI lamination (silicon steel product) :1. Specifications: EI24, EI-28, EI-30 ... standards3. Raw Materials (cold rolled grain non oriented silicon steel coils): a) Bao steel: B50A1000, B50A800, ... 50AW1300, 50AW1000, 50AW800, 50AW600, 50AW470 e) Imported silicon steel coils, such as Chinese steel.4. Applicable ... and ballasts. EI lamination (silicon steel product)