Extreme large closed SMB (160cm high) with a one-way valve and dump valve. The buoy is a necessity to complete a dekompression-stop in a safe way. Delivered with a strong nylon strap, so it easy to handlre and connect to a line wheels. 

• Dimension
  160 cm high.
• One way valve
  Can be inflated with the mouth or a regulator.
• Dump valve
  Secure overexposure.