IHI CCH500-3 Track Shoe, or you can called CCH500-3 Track Pad. the details information as follow, 1. Material: 31Mn2Si 2. Attachment is Pin, Bolt and Nut. 3. About Us: Our company, Shandong Value Machinery Manufacture Co.,ltd is professional manufacturers of crawler crane undercarriage parts, and we have been in this line more than 20 years, has rich experience.