1, Komatsu Excavator Hydraulic Cylinder 2, High Quality and Competitive Price 3, Professional Service Komatsu Excavator Hydraulic Cylinder, Piston Rod, Cylinder Head, Shaft Nut, Cushion ... 3-50mmMaterials: 20 45 16Mn 27Si Mn 20Mn2Standard: GB8713-88 High Quality Komatsu Excavator Hydraulic Cylinder, Piston Rod, Cylinder Head, Shaft Nut, Cushion ...