New Kobelco Style 2438U1171S18 Hydraulic Cylinder Wear Ring. This is a New Seal Kit that fits the following Models and Cylinder part numbers. Model Num. Application Cylinder O.D. x Width Serial Num. Part # SK300 III ARM 2438U11071F1-F4 170 x 9.5 mm LCU0001- KOB-2438U1171S18 SK300 IV ARM 2438U11071F1-F4 170 x 9.5 mm LCU0101- KOB-2438U1171S18 SK300LC III ARM 2438U11071F1-F4 170 x 9.5 mm YCU0001- KOB-2438U1171S18 SK300LC IV ARM 2438U11071F1-F4 170 x 9.5 mm YCU0603, YCU0607, YCU0611- KOB-2438U1171S18 SK310 III ARM 2438U1171F1 170 x 9.5 mm LC04201- KOB-2438U1171S18 SK310 III ARM 2438U1171F2 170 x 9.5 mm LC04201- KOB-2438U1171S18 SK310 III ARM 2438U1171F3 170 x 9.5 mm LC04201- KOB-2438U1171S18 SK310 III ARM 2438U1171F4 170 x 9.5 mm LC04201- KOB-2438U1171S18 SK310LC III ARM 2438U1171F1 170 x 9.5 mm YC01301- KOB-2438U1171S18 SK310LC III ARM 2438U1171F2 170 x 9.5 mm YC01301- KOB-2438U1171S18 SK310LC III ARM 2438U1171F3 170 x 9.5 mm YC01301- KOB-2438U1171S18 SK310LC III ARM 2438U1171F4 170 x 9.5 mm YC01301- KOB-2438U1171S18 SK320 III ARM 2438U1171F1 170 x 9.5 mm LC04201- KOB-2438U1171S18 SK320 III ARM 2438U1171F2 170 x 9.5 mm LC04201- KOB-2438U1171S18 SK320 III ARM 2438U1171F3 170 x 9.5 mm LC04201- KOB-2438U1171S18 SK320 III ARM 2438U1171F4 170 x 9.5 mm LC04201- KOB-2438U1171S18 SK320LC III ARM 2438U1171F1 170 x 9.5 mm YC01301- KOB-2438U1171S18 SK320LC III ARM 2438U1171F2 170 x 9.5 mm YC01301- KOB-2438U1171S18 SK320LC III ARM 2438U1171F3 170 x 9.5 mm YC01301- KOB-2438U1171S18 SK320LC III ARM 2438U1171F4 170 x 9.5 mm