... High quality, Long-life, Unbeatable price for SUMITOMO O RING BOX, SUMITOMO UPGRADE O RING KIT – hydseal.com Part name ... : SUMITOMO O RING BOX, SUMITOMO UPGRADE O RING KIT Fit for excavator model: SUMITOMO Material: NBR 90 ... Shore Category Group: hydraulic seals Category: O RING BOX Equipment Group: Construction Equipment Equipment: hydraulic crawler ...