Bism Nereus Octopus Ti internal parts are made with titanium parts, making it lightweight and rust-free. 2nd internal component valve cones are POM resin Lightweight and rust-free. The swinghead keeps you feeling great at all times. ■Safety Second Weight: 13.2 oz (360 g) Height: 3.5 inches (90 mm) Mouthpiece Material: Silicone rubber Body Material: POM resin Face Material: Titanium Flow Mechanism: Automatic flow rate adjustment Operating temperature range: +5 to +50 °C ■Hose length: 800 mm Diameter : Inner tube / Outer diameter 0.5 inches (6.5 m) / Outer diameter 13 mm / Resin Fitting screw : 8 - 24 inches (13 mm) Maximum Working Pressure: 1 5 bar Minimum bending radius (inside hose): 4.5 inches (115 mm), Hose guard: Standard equipment