5-inch x 12.5-inch circular muffler with 2.25-inch free flowing spiral straight core, wrapped in 4-inch Dx3-inch L-shaped diagonal stainless steel mesh with muffler. Limited lifetime warranty. Because the length difference between two channels is equal to half the wavelength of the sound wave, when two columns interfere, the two columns of sound waves cancel each other out, weaken the sound intensity, and make the sound smaller, thus achieving a silencing effect. The resistive muffler mainly uses porous sound-absorbing materials to reduce noise.
