Groco Backing Blocks

Miami Marine Verified independent store

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• Each size fits multiple seacock sizes.• Press threaded brass inserts into the hull side of thebacking block into the holes that match the seacockflange.• Rigid 1/2” thickness pro vides secure installation butis flexible enough to conform to minor hull curvature.• Will not swell or absorb moisture.• Made from an environmentally friendly PVC foamspecially formulated for marine applications. Show more