-Back pressure compesented so flow accuracy is not affected by restrictoin
-Available in arrange of flow 200cc/ min to 701/min
-Available in oxygen, Medical Air, heliox, CO2 and N2O
-Color coded inner tube and knob, Gas specific labelling
-White background for enhanced visibility includes an inlet filter and inlet extension
-Available in 50,60 and 72,5 psi source pressure
-No Strip "D" shape knob
-Y-block and power-take off configurations available