EI Lamination: for various transformers, ballasts produce UI, TL etc stamping parts Certificate:IS09001, ISO14001 EI Lamination:1) Specifications: EI-28, EI-30, EI-35, EI-41, EI-41 ... forcustomized specification. Please do not hesitate to contact with me for best quotation.. EI Lamination (silicon steel sheet) transformer lamination