Sea Choice - Mushroom Anchor - Vinyl Coated - 20 lbs. - 41270. Aluminum painted iron with a vinyl coating. For small boats and mooring buoys. One-piece cast iron in two coating choices: double dipped painted aluminum for rust resistance and heavy gauge black vinyl for hull protection. Most effective in sand or mud.. Features:. Weight - 20 lb.. Boat Size - Up to 24'. Vinyl Coated