Groco Sea Cock Backing Block Size:2''2.5'' Start with a Fusion MS-RA770

Start with a Fusion MS-RA770 or MS-RA670 touchscreen marine receiver

Resolution: 0

Brass hose fittings are durable and rust resistant

Comfortable fit through the seat and thigh with more room to move and a straight leg opening

Groco Sea Cock Backing Block Size:2''2.5'' Start with a Fusion MS-RA770Backing 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