CB Type Series Muffler With Steel Copper Plated Nipple Brass and bronze mufflers offer several advantages, including: High-Quality Copper Alloys: Brass and bronze silencers are usually made of high-quality copper alloys, which have excellent mechanical properties and corrosion resistance, allowing them to maintain stable performance in a variety of harsh environments. https://www.nbmspc.com/product/brass-and-bronze-muffler/