Used to regulate and measure flows, all working parts and indicia are visible, meter readings are unobstructed; the outlet swivels 360 degrees. Pressure tight to 2Kg/cm2 or more (air). Flow rates from 5 to 50L/minute air or 0.1 to 500cc/min water. Each tube is furnished with either a 316 stainless steel or glass float (some sizes include both), a set of average calibration curves plus/minus 5% of flow for temperature, pressure and specific gravity. Exposed surfaces are glass,nylon,316 stainless and FETFE.