Replacement parts for Komatsu, Hitachi, Kato, Dawoo, Hyundai, Sumitomo, Samsung, Kobelco and Mitsubishi equipment 1.products picture:2.Advantages / Features: Our products are developed based on special high-quality steel. Noted from the hardness distribution curve which is made through inspecting to the anatomized idlers: reasonable hardness distribution curve, high hardness, good wear-resitant ...