The Ellipse octopus uses the same elliptical housing as the Ellipse model second-stage regulator which is made from hi-tech polymers. The octopus model has a bright yellow purge cover and hose for easy identification in an out of air emergency. The octopus hose is 39" (100 cm) in length. All the internal components of the Ellipse octopus are the same as those found in the standard Ellipse; making periodic service parts the same as the primary regulator. Although the initial opening effort of the octopus regulator is set slightly higher than the primary Ellipse, once the valve has open the air is channeled by injection to the liquid silicone mouthpiece creating a venturi-effect enhancing the performance. On the top of the housing there is a flow deviator that acts on the Venturi effect, with dive/pre-dive switch. The Ellipse octopus is factory set to work with a supply pressure between 130 to145 psi (9 to 10 bars) and will work well with Cressi first-stage regulators and any other manufacture with similar first-stage supply (intermediate) pressures.