... than 20 years experience 1,Name: 12L14 end core with nickel plated;End core with nickle plated;12L14 end core2,For the ... similar end core,what can we do ?(1), Ability for the material of ... this kind of end core : Grade3.6,4.6,4.8,5.6,6.8 ... ,9.8,10.9,12.9,etcCarbon steelGr.B,Gr.C,Gr.D,Gr.36,Gr.58,1010,1015,1016,1020 ...