https://www.force-e.com/innovative-scuba-concepts-signal-tube-6-w-dump-val.html?source=facebook
Innovative Signal Tube 6' w Dump Valve - Force-E Scuba Centers
This unique signal tube comes with an opening in the bottom of the tube and is weighted by lead.
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https://coralseascuba.com/akona-safety-signal-tube-scuba-smb/
Akona Safety Signal Tube Scuba SMB - Coral Sea Scuba & Water Sports
Explore the world of diving with Coral Sea Scuba — your Southern Oregon dive shop for SSI certifications, scuba gear rentals, online sales, and adventure...
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