... 2) Materials silicon steel sheet 3) Used for lighting Ballast Magnetic Core Lamination:1. Specifications: EI-203 (width: 203mm)2. ... , B35A550, B35A440 b) Tai steel: 50TW800, 50TW600, 50TW1000, 50TW470 c) Wu steel: 50WW1300, 50WW800, 50WW600, 50WW470, 350WW360, 350WW310 d ... EI type silicon steel sheets and non-standard lamination (magnetic cores for motors, ballasts, power switches, and automobile ...