... EI162,EI168 EI171 ,EI174,EI180,EI192, EI210 ,EI240 2)Silicon steel gradeA)Wisco50ww1300,50ww800,50ww600,50ww470,50ww400,50ww350B)Baosteel B50A800, B50A600 ... , B50A470, B35A550, B35A440C)Tai steel 50TW800, 50TW600, 50TW1000, 50TW470D)Ma steelM50W470,M50W6003)Gap sizes EI ... .26.0,6.73,8.38website:http://www.chinasiliconsteel.com/ Transformer ei lamination