Mares Safety Stop Marker Buoy 3-5m safety/decompression stops - depth control ? Compact packing size ? Highly visible safety orange ? Strong Brass Hook The safety buoy that keeps you under control. Thanks to its high inflatable volume- the HD construction and the strong brass hook- the buoy highly secures surface floating while you manage your safety stop.Produced in highly resistant PVC material- printed- as required by national and international law- with "DIVER BELOW".