Muffler 1/4 NPT Male, Steel, 21 Scfm 100 PS Maxmum Flow, 43% OFF Air Exhaust Silencer Flat Disc, Type V Pneumatic Exhaust Muffler - 5 Pack Air Exhaust Muffler About this item If you work with pneumatic equipment, these Joywayus mufflers are absolute must-haves for reducing noise in your workshop! This 5-pack gives you plenty for multiple machines or backups. Made from solid brass construction that stands up to industrial use without corroding or failing. The 1/8-inch male NPT threads make installation straightforward - just screw them directly into... It can be directly installed at the opening of vent of elements or devices. Exhaust Silencer Muffler at Samuel Benjamin blog Mufflers are used to reduce dynamic noise of the pneumatic components or device exhaust.