Precision Air Feeder – Model HX – Inexpensive, Fast, Versatile, and Simple to Operate. What more could you ask for? P/A Industries Precision Air Feeders handle a variety of different materials – Paper, plastic, foil, fabric, wire, tubing…You name it and the Air Feed will feed it. Installation is simple as is set-up. And, these Precision Air Feeds are so economical, many customers leave them permanently mounted to their tools.