The Deluxe Signal Tube lets you fill the tube at depth by holding the open bottom of the tube over a regulator mouthpiece while the regulator is being purged. When the tube is sufficiently filled with air, the diver can release it to the surface (while tied to a line). A built-in overpressure relief valve allows the tube to ascend without rupturing. There is also an oral inflate valve for surface use.
Measures 7″ wide x 60″ tall.
Develops 22 lbs of lift in fresh water.