This fits your .
Filter kit is designed to fit ash vac, cheetah II and cougar Mu305 and Mu405 vacuums. This kit has ash vac primary & secondary. These filters are flame Retardant. The brand name of the product is: Love-Less Ash Company
Love-Less Ash Company 2F22 Filter Kit Ash Vac Cheetah II Cougar MU305 MU405