Oxylife FA valve with flowmeter reduces the cylinder pressure by merely providing a variable restriction to the flow of Oxygen from the cylinder outlet. As volume of Oxygen in the cylinder reduces, the flowmeter has to be constantly adjusted to maintain the required flowrate. The flowmeter unit without control is fitted with jacketed type shatter proof tubes calibrated from 0-15ltrs/min. Humidifier Bottle (Screw on type) is Autoclavable, consist of an unbreakable jar with nut on cap fitted on top inlet and side outlet tubes. The inlet tube ends in a specially designed diffuser from which oxygen is bubbled through water before reaching the outlet. Combination Spanner is for fitting regulators & F/A Valve onto Cylinders and for opening Bull Nose type Cylinders. Can not be used to open Pin Index type Cylinders.