ITEM NAME:Oxygen Flowmeter -Oxygen Pressure Reducer Description: Gas Flowmeter Oxygen Pressure Reducing Regulators Valve is made of metal. Standard production workshop, with gas cylinder pressure display, pressure relief valve and humidification bottle interface, safe and hygienic, durable. Designed with a metal core and a copper filter those can filter impurities and clean the gas for your peace of mind. Reasonable structure, with strong operation, strong versatility and strong interchangeability. The oxygen inhaler humidification bottle has a muffler to reduce noise. Specification: Material: Metal Size(Lx WxH): 300 x 100 x 50mm/ 11.81 x 3.94 x 1.97 inch Package Includes: 1 piece Gas Oxygen Flowmeter Note: The above size is measured by hand, please allow slightly difference. Thanks ! SKU: DMO0019946573014445.The oxygen inhaler humidification bottle has a muffler to reduce noise. SKU: DMO0019946573014445. Reasonable structure, with strong operation, strong versatility and strong interchangeability.