Sur-Mark(TM) Buoys Sur-Mark(TM) regulatory buoys by Taylor Made are molded from tough, UV protected polyethylene and are foam filled to positively displace water. These buoys feature one-piece seamless construction, internal concrete ballast, recessed galvanized eye, and flat bottom for upright storage. Ballast/Anchoring: Buoy includes an internal concrete ballast and recessed galvanized eye bolt, but does NOT include the chain, shackles, or anchor weight. Product Highlights: Sur-Mark green channel marker buoy Molded from tough, UV protected polyethylene Foam filled to positively displace water Internal concrete ballast is included Recessed galvanized eye bolt (for chain or cable attachment) is included Does NOT include chain, shackle, or anchor weight Rated for freshwater and saltwater environments Approximate Dimensions: Item #: MB-SMG Overall Height: 49" Visible Height above Waterline: 39" Column Diameter: 10" Large Ring Diameter: 18" Approx. Buoyancy: 40 lbs Weight: 46 lbs Always check with the local agency governing your waterway before installing any navigational aids.See our full selection of safety and navigational products for marked channels and moorings.