... 2) Materials silicon steel sheet 3) Used for lighting Ballast Magnetic Core Lamination:1. Specifications: EI-203 (width: 203mm) ... c) Wu steel: 50WW1300, 50WW800, 50WW600, 50WW470, 350WW360, 350WW310 d) An steel: 50AW1300, 50AW1000, 50AW800, 50AW600, 50AW470 e) Imported ... EI type silicon steel sheets and non-standard lamination (magnetic cores for motors, ballasts, power switches, and automobile ...