Injection-molded MMP mufflers from Mead Fluid Dynamics Inc., Chicago, reduce noise created by compressed air exiting through valves or other components. At 100 psi, for instance, noise levels can be limited to 80 dB. The push-in stem design provides easy installation and removal. The mufflers are available in 1⁄4 and 3⁄8-in., and 6 and 10-mm sizes.