punching 1.material and size are nonstandard 2.drawings are appreciated 3.used in mutual inductor 4.OEM is ok punching1. Experience: Over ten years experience in metal stamping parts which cover more than 7000 square meters.2. Certificate: ISO9001:2008, RoHS.3. Material: stainless steel, iron (SPCC, SECC, SPTE, tinplate), aluminum alloy, red copper, brass, bronze alloy. etc. are available.4. ...