Bulldozer track link assy D4 1.Material:40Mn2 2.HRC56-58,depth:6-10mm 3. ... accepted in the world market with international standards quality. Suitable Model: Daewoo, Komatsu, Hyundai, Volvo, Kobelco ,Sumsung ,Mitsubishi, Kato,Kubota, Caterpillar ... for your referance Bulldozer chain link/link chain/track link D4