SUMITOMO O RING BOX, SUMITOMO UPGRADE O RING KIT, manufacturer, Professional excavator parts supplier, 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 ...