TL laminations for BallastsMaterial:50WW800,50WW600,B50AH350-A,B50A350-H,B50A400-A,50TW600 and so on. Thickness:0.5mm silicon steel ,TL ... ,35WW300,360400,35WW440 Taisteel:50TW800,50TW600,50TW470website:http://www.chinasiliconsteel.com/ Ballast lamination