Replacement part number: CMXZVBE38660 Compatible with models: 113170660 113179715,11317099 113177621 113170370 113179100 113179155 113170380 CMXEVBE17595, CMXEVBE17596 (Does not fit the following Craftsman model: 113.177280) Fits for Craftsman wet/dry vacs with a 2-1/2 in. diameter blowing port Vac muffler diffuser helps reduce air noise for quieter operation, Diffuses wet dry vacuum airstream to reduce blowing debris and dust Fits Craftsman wet/dry vacs with a 2-1/2 in. diameter blowing port Inside diameter is 2 inches and outside diameter is 2-1/4-inch Before you buy, please double-check the model you need to avoid buying the wrong one, if you have any questions, please send a message to contact us, the first time to give you a reply and help Compatible with Craftsman 12 gallon shop vacuum. This fits a standard 2-1/2" exhaust port Accessories are compatible with CMXEVBE17595 16-gallon 6.5-hp dry/wet vacuum cleaners and peak CMXEVBE17596 20-gallon 6.5-peak HP dry/wet vacuum cleaners Compatible with Craftsman Wet/Dry Vacs With A 2-1/2 In. Diameter Blowing Port This part is compatible with models including; 113170660,113179715,11317099,113177621,113170370,113179100,113179155,113170380 Replacement part number:16993,16991 CMXZVBE38660