GROCO Backing Block f/2" 2-1/2" Seacocks [BB-3] Electrical | Tools This is especially advantageous for

This is especially advantageous for sailors as it allows you to install the unit(s) in a greater variety of locations on the vessel

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GROCO Backing Block f/2" 2-1/2" Seacocks [BB-3] Electrical | Tools This is especially advantageous forBacking Block for 2" & 2 1 2" Seacocks Features: Each size fits multiple seacock sizes Press threaded brass inserts into the hull side of the backing block into the holes that match the seacock flange Rigid 1 2" thickness provides secure installation but is flexible enough to conform to minor hull curvature Will not swell or absorb moisture Made from an environmentally friendly PVC foam specially formulated for marine applications Specifications: