Drive Medical 540 Regulators Each 18303G by Drive DeVilbiss Healthcare GROUP: Respiratory & Oxygen:Oxygen :Regulators Item Description: Regulator Nut Connector, Screw Outlet, Liter Flow Increments: 0, 0.12, 0.5, 1, 1.5, 2, 2.5, 3, 4, 6 & 8, Green Packaging Desc: Regulator 540 Adult 0-8L Flowgrn Country of Origin: Harmonized Tariff Code: Product Description: