Scuba Choice 27-Inch Colored LP Low Pressure Braided Hose for 2nd Stage Regulator and Octopus For 2nd stage regulator & octopus Fitting tensile strength: 177kgf Working pressure: 1,000 psi. Burst pressure: 4,000 psi Inner diameter: 6.5mm. Material: TPE. Outer diameter: 12.5mm. Material: Polyester Mono Filament.