Product name:excavator hydraulic ram, bulldozer hydraulic cylinder, komatsu hydraulic cylinder, hitcha hydraulic cylinder, hydraulic ram, loader hydraulic cylinder, caterpillar bulldozer hydraulic 1. for construction engineering machinery, earth moving, demolition 2. The stroke from 50mm to 2000mm, OD from 100mm to 900mm 3. material: 45#steel, ST52, 35CrMo 4. working termperature: from -50°c to 90°c 5. heat treatment 6. High quality performance, one year quality guarantee period 7.Custom Mount Designs