... Materials: H13, H13K, 5CrW2Si, 6CrW2Si, Cr12MoV,HMB,HMkJinhai company has been approved by ISO9001 Quality Management System Certification, High-Tech Enterprise Certification ... and the certification of Brand name Products in Anhui Province. We also have kinds of materiasl patents, like HMB, HMK, ... and so on.If you are interested in our products we just need your dimension of the products that you need ...