Aqua Safety Sausage Marine Rescue Tube SignalnRequired Safety Device by Dive OperatorsnSafety is Important with or without StandardsnSmart Diver Carry Surface Marker Buoys On-Every-DivenDivers are all supposed to carry a Surface Marker Buoy (SMB) Safety Sausage" to comply with national dive safety standards. That nice, but your safety is important with or without standards, so the smart diver always carries a surface marker buoy on every dive. This inflatable bright-orange-color safety tube is easily seen by boats or from the air in an emergency situation. Tube inflates to 6.5' (198 cm) tall. When not inflated it fits easily in BCD pocket ready when you need it. Easy to inflate with your 2'nd stage regulator through the open end bottom. Made from durable plastic fabric for years of reliable service.