Double-lock In conformity to NSF 61 for drinking water standard Inner hose: EPDM, UNIPRENE,SAHEOPRENE Inner hose size: OD 9mm * ID 7mm Outer Diameter: 12.5mm, 14mm optional Appearance: chrome, nickle, bronze, gold, silver plated optional Working pressure: 290+/-10psi max Working temperature: 90+/-2oC max for EPDM, 120+/-2oC max for UNIPRENE and Saheoprene Fittings: brass