New Kobelco Style 2438U1948R400 Hydraulic Cylinder Rod Seal Kit. SK150, SK150LC ARM 2438U1948F1 90 mm – 90 mm Rod Kit YMU1001 – KOB-2438U1948R400. SK150LC III ARM 2438U1948F1 90 mm – 90 mm Rod Kit YM000101 – KOB-2438U1948R400.