Boom Cylinder Seal Kit 4438672 For Hitachi Excavator EX400-3 EX400LC-3 EX400H-3 EX400LCH-3 EX400-5Boom Cylinder Seal Kit 4438672 For Hitachi Excavator EX400 3 EX400LC 3 EX400H 3 EX400LCH 3 EX400 5 Details: ModelNum. Application CylPart# Code RodSize(in) Bore(in) Size Misc SerialNumber Part# ZX70, ZX70LC ARM 4388224 P UB 10 60 mm 95 mm 060001 HIT 4415584 EX ZX80, ZX80LCK, ZX80SB, ZX80SBLC ARM 4388224 P UB 10 60 mm 95 mm 060001 HIT 4415584 EX EX4003, EX400LC3, EX400H3, EX400LCH 3 BOOMLH 4310242 P UB 10 115mm 170mm 115X170 5001 HIT 4438672 EX4003,