The affordable alternative! These durable 20" (51cm) diameter inflatable buoys are perfect for marking anchors, moorings, hazards, and swimming areas. Great for setting up a personal watercraft or sailboat race course. Deflate them for space-efficient storage. These 20" (51cm) diameter buoys have an easy inflate/deflate stem valve, molded in handle for transport or line tie and are available in red or yellow colors.