Cutting edge 7V1490 Material:Carbon steel or Boron steel with heat treatment Hardness:HB300~350 or HB380~450 Ningbo yuanda machinery Co., Ltd is a professional manufacturer of cutting edge and end bit for all brands of construction machinery, It cooperaes with a trading company named Ningbo For-Global International Trade Co., Ltd whom suppliers with cutting edges, end bits, bucket tooth, adapters ...