CRAFTSMAN CMXZVBE38660 2-1/2 in. Muffler Diffuser Wet/Dry Vac Attachment for Shop Vacuums The CRAFTSMAN 2-1/2 in. Air Muffler/Diffuser is designed to reduce the operation noise of a wet/dry vac. This accessory connects to a blowing port to suppress motor noise without reducing suction power. Fits CRAFTSMAN wet/dry vacs with a 2-1/2 in. diameter blowing port. Features QUIETER OPERATION: Vac muffler diffuser helps reduce air noise for quieter operation REDUCES BLOW BACK: Diffuses wet dry vacuum airstream to reduce blowing debris and dust EASY INSTALLATION: Connects to the blowing port of the shop vacuum INDUSTRIAL-GRADE CONSTRUCTION: CRAFTSMAN wet dry vacuum attachments are built to handle heavy use FITS: CRAFTSMAN wet/dry vacs with a 2-1/2 in. blowing port USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.