1.High magnetic induction 2.Low iron loss 3 .Can make according to clients' requirements 4. ISO14001:2004 ISO9001:2008 1.materials:a)BAO Stleel:B501300 B50A1000B)WU Steel:50WW800 50WW600 50WW470 50WW1000 50WW1300C)AN Stee:50AW1300D)Tai Steel:50TW3102.For BTA series Straight tube fluorescent lamp ballast unit mm specificationABCDEFGHEI-41.341.335.327.513.826.619.15.66.9EI-414135.227.213.82618.85. ...