Transformer core: wide ranges of size are supplied Thickness:0.5mm or ... .4,EI162,EI168 EI171 ,EI174,EI180,EI192, EI210 ,EI240 2)Silicon steel gradeA)Wisco50ww1300,50ww800,50ww600,50ww470,50ww400,50ww350B)Baosteel B50A800, B50A600 ... .0EI-480.38, 0.8, 1.0, 2.4 EI-133.26.0,6.73,8.38website:http://www.chinasiliconsteel.com/ Transformer ei lamination