Light and very Flexible A multi-layer construction hose An average longer lifespan than traditional hoses Excellent resistance to abrasion For use with most types of octopus or regulator With  male 3/8\" UNF for the first stage fitting  With 9/16\" UNF swivel fittings for the second stage demand Valve or in the case of BC and Drysuit Hoses a DIN Fit Snap Connector  Hose protector supplied fitted. Wide Bore for High Flow rate Approved and certified to EN250 with standards exceeding these requirements