This is the Miflex Low Pressure(LP)Regulator Hoses Various Lengths and Color Features: Lightweight and flexible low pressure hoses Multi-layer construction Excellent resistance to abrasion Kink-resistant design Approved for use for use with up to 40% oxygen Individually tested at the factory EN250 approved Individually marked with the Miflex logo and date code Manufactured in Italy Miflex Low Pressure Regulator Hose Various Lengths and Color. Inner liner is made from polyether-based polyurethane, not PVC, as found in lesser-priced imitators