Scubapro Octopus R290

Features a classic downstream valve for optimal breathing performance.
Preset inhalation and Venturi-Initiated Vacuum Assist (VIVA) provides hassle-free air delivery.
Metal valve housing is built rugged and increases overall reliability.
Yellow super-flow hose is 39 inches long and features and oversized bore to increase airflow.
Ultra-comfortable orthodontic mouthpiece is easy to grip yet doesn’t inhibit airflow.
Weight (without mouthpiece): 5.0oz/141g.
Airflow at 2900psi (l/m/SCFM): 1400/50.