Brand-new, never used, scuba diving signal tube or SMB [ signal marker buoy ]. This is a Divers Alert Network SMB. It is 6 feet long, in fluorescent orange, with a reflective silver/titanium strip running the full length of the tube. This signal tube has a clip to attach to your BCD and also contains a separate mesh pocket with a signaling mirror, a waterproof whistle and a chemical light or cyalume for night diving. asking $50.
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