Original New YAMAHA O‑Ring KM1‑M7186‑00X 90990‑17J007, size 5×1.0mm. SMT spare part for pick‑and‑place machine head vacuum seal. Fit for YV100X, YV100II, YV100XG, YG200. High‑durability rubber O‑ring, prevent vacuum leakage, ideal for head maintenance kits. In stock, fast shipping.