1.chain pin (04C-24A) 2.material:20CrMnMo ,40CrNiMo ,20CrNiMo ,GCr15,35CrMo,50CrVA,30CrMnTi,38CrMoAl,40Cr 3.1.80mm-15.0mm( ... 1.chain pin(04C-24A) 2.material:20CrMnMo ,40CrNiMo ,20CrNiMo ,GCr15,35CrMo,50CrVA,30CrMnTi,38CrMoAl,40Cr 3.1.80mm-15.0mm ...