Outer Bag W/muffler Kirby Avalir Platinum Vacuum #187925AThe outer bag with muffler on the Kirby Avalir Platinum does double duty: it houses the inner filter bag and dampens motor exhaust noise, so replacing a worn or damaged one restores both the look and the sound level of your machine. OEM Kirby replacement part built to factory specifications for the Avalir Platinum Integrates the muffler assembly, helping reduce exhaust noise during operation Direct fit ensures proper alignment with your Kirby's bag