Ordering Instruction(for prime coils): 1, Which Grade? if you do not know the exact grade, please tell us below: 1), What's the thickness of the material? 2), What's the core losses @1.5T/50Hz(or 60Hz), for Oriented electrical steel, please tell the core cosses@ 1.7T/50Hz or 60Hz; 2, What's the desination or discharge port? 3, How about the quantity? If any technical issue about the prime coils or related to cores, welcome to contact us anytime.