AMO Series are Brass or 303 Stainless Steel adapter orifices available with 10-32 UNF, 1/8", 1/4", 3/8", or 1/2" National Pipe Threads. Also, orifice sizes are 0.004-0.125 MM, Stainless are 0.004-0.125 MM. Used for Air, Water Gas applications up to 100 PSI. Furthermore, they are used for Speed control for cylinders and actuators. Orifices are Bi-directional flow with predictable flow rates.