GasBOAT high pressure flexible hose conforms to ISO 10380 standards and complies with requirement 6.3.1 of ISO 10239 (2014-12-01) for Small Craft LPG systems. This is a 534mm (21") length of convoluted stainless steel hose featuring stainless steel nuts at each end, connecting to M20 fittings to connect gas cylinder adaptors to regulators. This hose has a 20 year replacement life.