Ridgid VT2525 2.5 Inch Muffler / Diffuser Accessory for Ridgid Wet / Dry Vacuums (Adaptor Included) REDUCE VACUUM NOISE: Plug this into the blowing port of your Ridgid vacuums, and youll have a more comfortable time on the job as the noise is cut down INCLUDED ADAPTOR: This will help you plug this tool into different Ridgid vacuums with a 2.5 inch port EASY INSTALLATION: All you need to do is connect the accessory to the adaptor, and push the adaptor into the Ridgid exhaust port of your choosing, and this tool will do the rest VACUUM SUCTION NOT REDUCED: You dont have to worry about your vacuums power being reduced, as long as your hose is 20 feet or longer, as this tool just plugs into the exhaust port