GasBOAT high pressure flexible hose conforms to BS3212-2 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 black rubber hose featuring a stainless steel swage and brass nut at each end, connecting to M20 fittings to connect gas cylinder adaptors to regulators. This hose has a 5 year replacement life.