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The Moroso Square O‑Ring specified as a replacement for part number 21597 is a sealed component intended to restore or maintain proper sealing where the original O‑ring is used. Use this square-section O‑ring as a direct-fit replacement during repairs or rebuilds to prevent leaks at the original sealing location. Match the part number to confirm correct sizing.
Moroso Square O-Ring (Replacement for Part No 21597)
