International standard EI-Lamination which is uesd for lamp Contact Number:86-510-86175783.Website:http://www.chinasiliconsteel.com/Silicon steel gradeA)Wisco 50ww1300,50ww800,50ww600,50ww470,50ww400,50ww350B)Baosteel B50A800, B50A600, B50A470, B35A550, B35A440C)Tai steel 50TW800, 50TW600, 50TW1000, 50TW470D)Ma steel 50W470,M50W600 silicon steel sheet