Never loose the boat with this 6 foot easy to spot deluxe marker signal tube from Marine Sports. Comes with oral inflator opening, dump valve, safety whistle and vinyl light stick holder! This unique cordura signal tube also comes with an opening in the bottom of the tube and is weighted by lead. This allows the diver to inflate tube by free flowing air from the regulator. Unique internal membrane keeps air inside until released by activating dump valve. In addition, this signal tube can be inflated with screw down oral inflator. 6 foot cordura tube Come with “screw down” oral inflator, safety whistle and vinyl light stick holder