... Iron loss 3. ISO14001:2004 ISO9001:2008 Ballast Core features1) Specifications: 60F,75F,96F,78F,120F.2 ... to all kinds of ballast5) Materials (silicon steel sheet): a) Bao steel: B50A1000, B50A800, B50A600, B50A470, B35A550, B35A440b ... 50WW470, 350WW360, 350WW310d) An steel: 50AW1300, 50AW1000, 50AW800, 50AW600, 50AW470e) Imported silicon steel coil stocks. specificationABCDEFGAir gapHID-60F6041. ...