GROCO Backing Block f/3/4" & 1" Seacocks

<p><strong>Backing Block for 3/4" & 1" Seacocks</strong></p><p><strong>Features: </strong></p><ul><li>Each size fits multiple seacock sizes</li><li>Press threaded brass inserts into the hull side of the backing block into the holes that match the seacock flange</li><li>Rigid 1/2" thickness provides secure installation but is flexible enough to conform to minor hull curvature</li><li>Will not swell or absorb moisture</li><li>Made from an environmentally friendly PVC foam specially formulated for marine applications</li></ul> <!--- cis2:mm5sl5hm --->